I call BS

"Apple identified 114,000 viruses that target PCs and that it did not claim Macs were entirely immune to viruses."

The 114,000 viruses Apple have identified are not targeting PCs - they are targeting Windows. Since you can quite happily run Windows on an Intel Mac (and most of the Mac users I know are doing this in a dual-boot configuration), these viruses are a threat to any computer running Windows, including PCs and Macs alike.

Of course, Macs are also susceptible to the handful of Mac OS X viruses out there. Although these don't actually account for any real risk in the real world, it's fair to say that PCs are "immune" to these viruses since Mac OS X refuses to run on them, Therefore, if you wanted to be really picky, you'd have to say there are about 114,000 viruses for PCs and about 114,010 viruses for Macs (this doesn't include viruses for Linux, which can run on either platform).

In conclusion, Apple's adverts are misleading. This is not a "Mac vs. PC" issue, but rather "Mac OS vs. Windows". Apple should have been forced to make this clear in their ads.