Recovery time depends substantially on the surgical approach. Posterior approach will require more convalescence, more rehab, more time to resume full activity, and more restrictions during recovery.
I suffered with this shit for 5 years because I was too afraid to get the surgery and incapable of deciding between THA and BHR. THA surgeons all recommended against BHR because of the potential issues with metal-on-metal hardware; meanwhile, BHR surgeons presented BHR as a no-brainer for several reasons and downplayed (or completely ignored) the MoM issue. I also cared more about the least invasive procedure with the least amount of pain and the quickest recovery. The BHR guys also (mis)represented BHR as less invasive, when, in fact, it's much more invasive because of how much access to the joint it requires. Finally, last year, I found an experienced THA surgeon (Alexander Neuwirth at NY Cornell-Weill) who uses a plastic ball in a ceramic cup and does it with a minimally-invasive anterior approach. Up to that point, the only THA surgeons on my insurance plan used metal components and/or only do the posterior approach. I was still very skeptical about believing what he was telling me about how my being an ideal candidate and my current physical condition meant that I'd recover very quickly; and I was even more skeptical about being back on the ice in "6-8 weeks."
He was right. Surgery was March 12th around 7:00 AM and the only reason I didn't leave the hospital even a few hours earlier than 4:00 PM was because I was still dizzy from the pain meds and because it took me that long to produce any urine to be sure there were no issues with that. As soon as my head cleared, I walked around the ward basically carrying my walker in front of me without needing it. I used it for safety to get to the car and from the car to my apartment and that was the last time I touched it. I spent much of the next week lying on my massage table because it allowed me to angle my head down and feet up to keep the swelling down. Swelling still moved all the way down my leg and peaked at 7 days. Zero hip pain and some minor discomfort in my quads for a few days. Started upper body training after 7 days because I was still feeling sort of weak; but I could have started immediately if I'd wanted to. Zero prescribed rehab because I have my own gym at home and zero post-surgical hip precautions: the anterior approach allows you to bend at the waist and to do everything except torque your hip by twisting your body while standing on that leg. I did nothing besides my normal leg training for rehab (eliptical, leg extensions, squats, leg curls, hyperextensions, and some band work for abductors & hip flexors). For the first 6 weeks of training, I substituted reverse hyperextensions on a big exercise ball for traditional hyperextensions, because I didn't want that pressure directly on the hip joint. I also waited 6 weeks before doing my abs by hanging upside down on my inversion table.
I started walking up and down the hallway outside my apartment daily for the first two weeks and after my two-week check-up, I got the go ahead to get back on the eliptical and to start light leg workouts. I worked out pretty hard for the next 4 or 5 weeks and at my 6-week follow-up, he told me I could get back on skates. I got on the ice 7 weeks to the day from my surgery and within a few of hours on the ice (over 2 weeks), I was pretty much back to normal. Been going to sticks and pucks 2-3x/week since early May and have my 4th game tomorrow night. I slip some extra neoprene padding under compression shorts over my hip right on the joint, just in case I get knocked off my skates and fall directly on it. He said the biggest risk is a direct impact only because the titanium implant is so much harder than the surrounding bone that the femur could crack if I fell directly on the hip hard enough. Other than that, the only risk is high-impact sports, which my surgeon doesn't recommend (at all, ever) for recipients of THA. That's no issue for me, because I don't do anything high impact and all of my cardio is on the eliptical. I'm mainly a center and while I'm not that great a player, I typically cover more ice in any game than anybody else on the ice. My surgical hip is now one of my only joints that never hurts.
Ultimately, the long-term results are the same whether you have anterior or posterior THA, and (functionally), even if you have BHR. The posterior approach typically takes about twice as long to get back to full activities, requires rehab, and involves some more pain, especially initially, and there are strict hip precautions (i.e. no bending past 90 degrees at the waist and no crossing legs) for a few months. BHR is also a harder recovery than anterior THA, but is fine, as long as you're not one of the unlucky few who have metal ion issues.
Let me know if you have any other questions.