Is anyones Mac Pro laggy? My current pro which is getting sent back seems to be a bit laggy. For example when I type in Coloquy words that i've typed pop up after 3-4 seconds sometimes. This also happened in iChat; Vista was laggy, but I did not expect OSX with 4 cores and 6gb of ram to be laggy. What's the deal? Is OSX just laggy like that or is it coloquy and ichat? Or is it just a bad Mac Pro?