Every meeting I've been in, for several years, has been dominated by Mac laptops. Some of these people are hackers, some are decision makers, some journalists, they all buy Apple laptops. They work for the government, for private businesses, for pseudo-state entities like the broadcaster or railways. Macs are everywhere.
At work, we write software which runs on Linux (some of it is Free Software) and Java web applications which run on servers that in turn run Linux. Our 6-7 person technical team consists of one person with a Linux laptop (me), five with Macs including the CTO (who is also a perl hacker when he's not busy in meetings with suits) and one guy with a Windows laptop.
I'm the only one who can run our most important new software natively on the machine he uses to read mail and the web, but today that doesn't matter, everyone can have a VM, or just connect to a development server over the Internet, and they're more comfortable in OS X.