Hi Codey, yes I have tried that.. I was originally timing it from my mobile phone but after all the controversy I though it would be a good idea to double/treble check how accurate it was.
I checked my mobile phone against my PC and it was accurate to it and then I checked the both of them against a hand held stopwatch/lap timer.. all 3 ran the same speed. My arduino is approx 4 weeks old and is an Arduino Uno.
Hope that helps. :-/