Considering that less then a handful of the THG forum users have used servers let alone multiple servers your survey will be flawed.
I was meaning this to be a desktop/laptop user survey but if you have a server in your own house (residence) count yourself in for that.
I have over 100 servers in house and have found that a 64-bit Redhat running more than 4GB (most of my machines run 8-32GB RAM) is far superior to the 64-bit win2k3 servers running more than 4GB of RAM.
The only servers I have ever dealt with didn't run Windows either. The first was a Macintosh Centris print server running MacOS 7 and hooked to a very early Apple LaserWriter and a dot-matrix but color ImageWriter. That had to be about a dozen years ago. The second was a dump of an Athlon XP 1600+ unit running Red Hat 7.3 and handled login from about 15 whitebox Athlon XP machines (mostly 2400+s), this guy's desktop (dual Athlon MP) that ran FC4, and the two number crunchers I built for him (dual 2.8 Xeon Irwindales, 4 GB RAM, FC5 64-bit and X2 5200+, 4 GB RAM, FC6 64-bit.) The third and fourth were university servers that I used for work, not worked on physically. One was a dual 2.8 Xeon Dell running RHEL 4 and the other was a dual Xeon 5060 unit with 12 GB RAM that was the head node on a 512-CPU Rocks cluster made up of 128 2Us, each with two 2.8 Paxvilles and 4 or 6 GB RAM.