Okay, well that's promising. General slowness is a pretty difficult problem to remedy until we can work out what's causing this. I wouldn't bother with a reinstall just yet because we don't know for sure if it'll help and you might lose data, settings or whatever.
- Do you have plenty of free space on the internal boot drive?
- Do you have any third party peripherals installed?
- What apps are you running?
- Do you notice the slowdown correlates with anything you do or change?
- If you open Activity Monitor in the Utilities folder, is there any process that's using up a lot of your resources (CPU and RAM)?
- Still in Activity Monitor, do you have plenty of Free RAM + Inactive RAM?
- If you restart your machine and then check Activity Monitor in an hour, how many page ins and page outs do you have?
That's really all I can think of for now. Sorry for all the questions but hopefully something in there will help us work out the source of your problem.