As a parent, unless I was dealing with a biomechanical issue that is ONLY solve-able with custom skates, I would have a hard time buying True (or any fully custom) skates for a kid under 16 that has not reached his/her full development - and I'd imagine that the vast majority of parents feel the same way. I understand that a few parents at the margins will pay whatever it costs to have the 'latest and greatest', but it just seems like a unnecessary waste of money to buy custom skates for a 14U player who's still got (potentially) upwards of three years of growing to do...
Anyway.
As a coach, I can tell you that after having my True skates for about 3 weeks, I no longer notice the weight difference - except when I pull them out of my bag...at which point, I'm like, 'HOLY S&#T, these are TANKS!' Once they're on my feet, however, it's all good and I don't notice anything. Do keep in mind, however, I'm coaching, not playing. If I were still playing at a high level, maybe I would notice that difference (in my case, my Trues are almost 21% heavier than my TotalOnes) in the third period? I mean, I guess I probably would?
That said, what I DO notice is that my body mechanics are better in my Trues. I have to 'think less' about maintaining proper ankle/knee/hip alignment when I'm showing the kids a drill, because my body naturally goes there...which is not to say that I DIDN'T have proper skating technique in my TotalOnes...but it just 'feels' more natural in my Trues. Also, I KNOW I'm better on my edges. It is absolutely indisputable. Techniques that I used to put a HUGE amount of thought into executing properly now come smoothly and effortlessly. And I have also been able to drop from a 1/2' FBV/Fire sharpen to a 5/8" FBV/Fire, which has allowed me to noticeably increase the glide portion of my stride.
As such, for me, AS A COACH, any weight increase has been more than offset by the performance benefit.
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(N.B. I am willing to stipulate that some of this perceived benefit of the Trues could be due to the placebo effect - i.e., I did SOMETHING (spent actual money on new skates) so my brain is telling itself that I'm doing a better job than I was before. I've seen video and I think I look 'smoother'...but, again, maybe I'm just telling myself that? Also, some of this benefit could be due to the obvious improvement of Step over Bauer stock steel...)