Yeah, I also have to floor it just to get my car to accelerate at a decent pace. Another problem I have is that around Pittsburgh, on-ramps are either really short or non-existent. So even with a powerful car, you have to give it quite a lot of gas.
What's more annoying are those people who go all the way to the end of the ramp and stop. In those cases I just wait at the beginning at of the ramp for them to move out of the way so that I don't crash into the back of them as I try to merge.
There's this one on ramp I take frequently which is rather short. You can't enter the ramp at a good speed because it is preceded by a really tight turn (when you enter the ramp, you're doing 20 at best). Usually when there's no one else on the ramp and traffic is not very heavy I can just charge down the ramp without having to stop first. However, in those instances when there's some dumbass who's stopped at the end of the ramp because he/she couldn't merge properly and/or traffic is really heavy, I stop right at the beginning of the ramp. Once/if the ramp ahead is clear, I look for an opening. As I see one approaching that's big enough, I weld the gas pedal to the floor. If I time it right, I'll be able to squeeze into traffic doing at least 50 without having to lift off and the guy behind me won't have to slow down much, if at all.
Recently I've tried to get my POS car off the line faster by stalling the torque converter as I'm about to take off. It helps.