Is the Mac version still optimized with Altivec?
Yes, it is.
BTW: The WUs differ a bit in length depending on the frequency. The longer ones should take about the same time than the previous ones, but at lower frequencies we have some that take down to 1/4 of the time.
BM

New Application "Albert"
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Reinhard just tracked this down. It turns out that these workunits that run in less than an hour are a mistake in our WU generation. It's not serious enough for us to fix. But the jobs between 290 Hz and 300 Hz will complete more quickly than they are supposed to.
Thank you for calling this to our attention!!