I have an Apple Mac Intel DTK right here, and I don't think I'm outside the bounds of my NDA when I call B.S. on this one, since I've seen screenshots posted online from other people's DTK's, so I can comment on what's well-known from publicly available information.
When Hyper-Threading is enabled, the Menu Extra shows an "HT" where they tried to overlay a "4". More obviously, with HT, the Processor Palette's display gains a horizontal split right down the center of the black graph area, with (okay, rotate this 90 deg CCW): [ Thread B | Thread A ]. If you disable Hyper-Threading, the display has no horizontal line or header near the top. The images are stolen from both an Intel DTK and from a dual-PPC Mac, and the image appears to have been composited/captured on a single processor machine anyway, since the Dock icon shows an indicator for only one CPU; on either a dual-PPC or a single-core x86 Intel with HT enabled, it shows two indicator columns, one for each logical unit!
Their mockup of Activity Monitor is also a sham. Due to the way memory allocation works in Darwin, you won't likely find six identical processes with the same exact real memory allocations, nor would you see a threaded CPU utilization with such little deviation (and the total utilization doesn't mathematically correspond with the time-lapse/average usage graphs anyway). The sequential PID's are another giveaway.
The "Genuine Intel" pictures are definitely NOT from an x86 version of Mac OS X 10.4.1 or 10.4.2, otherwise the screenshots would be WATERMARKED with a visible pattern! Yep...
Someone's been having fun with Photoshop. I could have easily fabricated a better spoof than this one...
And yes, I'm having fun with smileys.