Surprising comments on the C152...though, to be fair, I have nothing to compare it to!
With flaps 10, I rotate at about 55 with a very light and short tug on the yoke. I fly out of Leicester (elevation 469ft). Admittedly I'm only at the early stages of the PPL so most of my flying has been done in the colder winter months but the effects of that are probably quite negligible.
It's a bit more ground-gripping on short-field takeoffs - I start encouraging it to lift at about 45 KIAS and it just about gets off the ground a bit above 50 I think...
Sounds like I'll feel spoilt by takeoff performance if I fly anything else...!
V1R