I do see a lot of Mac references that assume old hardware and operating systems. There are claims of viruses in the wild, or an OS without SMP and preemptive multitasking, not good for server use and having no appreciable server software for it. I've also seen hardware claims that it is completely non-standard and closed (as in, can't get standard peripherals, hard drives, memory, etc.).
I can't remember a Mac person slamming Windows for being just a DOS shell or having no file security features (IOW, confusing current Windows with 9x).
Well, if one intends to flame, one should at least make the flames semi-accurate ;)
Anyway, it is a two-way street, though. To listen to some folks around here, the uptime of Windows is measured in seconds, and about 99% of the time the power is on, the machine is blue-screened. Well, you know, I honestly can't remember the last time I saw a stop error - it's been literally years. And it's not like I'm not pushing it - I'd bet money that I push my machines harder than most folks. Obviously, I don't claim that it's completely extinct - flaky drivers or bum hardware will scram any OS - but the general characterization of MS stability looks to me to be stuck in about 1996. It's like folks stopped paying any attention to alternatives back in the Win 95/System 7 days. Whatever your perception of the OS was 10 years ago, that's how it still is today. Or so the assumption seems to be.