Funny about that.
As far as i know, the major CAD programs do not run their Client versions in Linux. Most are Windows only.
Some of us classify CAD and the associated engineering as "real work".
I point I make quite often when comparing the two OS's salient points.
I too run the 'doze OS for those high-end Computer Assisted Design programs, specifically because they are not yet ported to Linux. Some of those programs however are already ported to Unix and Solaris so I am hopeful that once the userbase in Linux reaches a certain point the vendors will realize the market opening up and start offering them.
Really ticks off the Macophiles when I point out how out of all those high-end design programs, there are NO versions available for any apple boxen. The audible grinding of their teeth is always worth a grin and a smirk at them.