I will also note that I'm not a 'webdev', but I am a destkop and server-side software developer. I came to OS X by way of IRIX/Solaris Desktops -> Linux/FreeBSD Desktops -> Mac OS X 10.0.

My preference isn't borne of ignorance, although I think Linux's failings have a lot to do with ignorance from Linux/GNU developers about how the professional development world produces a coherent platform.