Erm, my first bass was a Washburn B2 which has a similar fast-to-me neck profile to the easy-to-play Ibanez I've got sitting around here somewhere.
My current and former Precisions' rounder profile is much slower for me to play...I mean, harder for me to play fast.
Longer-scales and even 34" I tend to need to try to lift the head up to give me better access to play fast at the low end, for example on RHCP's Suck My Kiss.