I couldn't agree more. I've been using a MacBook Pro in my enterprise DBA job for the last year. In that time, the Enterprise-grade AD has suffered numerous outages and fallen to two viruses. During that time, my consumer-grade laptop has powered through the darkest hours, providing me with quick access to our data centers and generally outperforming the Windows-based machine on my desk.
Furthermore, our corporate wi-fi has been nearly unusable for the past two years, and because our overlords are cheapskates, our meeting rooms have four-port Ethernet hubs at best. I walk into a meeting room and set up a wireless hub via my laptop in seconds and everyone in our group is connected and working quickly.
I can't even imagine the corporate nirvana that would exist if we qdid away with much of our Enterprise setup and instead replaced all 10000+ employees' machines with Macs.
Long live the Mac's non-Enterprisiness!!!