A funny response (truly), but Office on OS X (which I use extensively) never lags like that for me, even on older Mac hardware (Core Duo from 2006 or so).
True. But, anecdotally, I never leave Office programs running, because they seem to chew thru my battery. I like Entourage better than Mail.app, but use Mail.app because it sips battery.
Sadly it totally does for me. And while this is different problem, Word on OS X still seems to think Copy-Paste is a computationally complex problem on par with decoding the human genome.
