|Think about Loose Coupling|
I had heard that, too, but the last word I'd heard (again, a while back) was that Management (!) was insistent upon eliminating BSD, no matter how many (hundreds of) boxen they had to add.
Here, our whole division's DNS and routing trees, and quite a few of our heavy load servers, are now happily FreeBSD. Every time the NT-oriented senior folks have a "moment", they task a junior admin with the problem and he solves it with FreeBSD. Our CAD systems admin would love to replace the RHL-E3 boxen that are used for EDA chip-simulation runs with FreeBSD, but he keeps running into places where the apps are Linux-specific, such as expecting a non-standard xterm. For the tools for which they do work, they're both faster and much more load-tolerant than the RH machines.
We SHALL overcome! :D
"There's more than one level to any answer."