The real reasons that the 100 Best comes out mid-year (covering the end of 2006 and the start of 2007) are detailed in a post from once-and-current big kahuna Harry McCracken. It comes down to legacy scheduling of the product awards around the June date of the no-longer-extant PC Expo trade show. That's a relief; I was worried that we were changing the calendar again.
Anyway, more to the point: the list is top-heavy with some big Mac products, including TUAW darling Parallels Desktop at #6 (the top-ranked application on any desktop platform, not counting #1 Google Apps Premier Edition), Mac OS X 10.4 Tiger at #9 and AppleTV at #11. The Intel Core 2 Duo processor that powers new Macs is a top pick at #2. Noticeably absent from the top 100 was the latest hotness from Redmond, which may correlate with PC World's comment on the Tiger ranking: "Name a good Vista feature that goes beyond what's in Tiger. Yeah, we can't either." Brrrrr.