acceleration

Hey guys, I have been searching for accurate information all over the forum and internet for how long a wrx lasts for... But can't seem to find anything concrete. So I will ask the owners. I am interested in buying a 2002 wrx but can only afford one that all ready has over 100,000-110,000 miles...

I recently bought a standard WRX new from the dealership. After the initial break in period where I kept the revs below 4k for the most part I've started to open up the engine. It certainly seems fast but in brisk acceleration it seems to hesitate slightly above 4K rpm especially in second gear...