Yep, pretty accurate. I do wear my shoes snug, but not tight, then again the sizing varies even within brands... I wear anywhere from a 9 to a 10.5.
My size 10 Red Wing Chukka boots that fit me very well (they were a bit tight at first) say 28cm on the label.
I do remember those Synergy skates fitting fine, not loose but also not super snug. The Razor Blade holders on that skate were a size 288, while on my current skates they are a Tuuk LS2 at 280.