This is just a guess, since I dont have those figures, although that brings up a good point, that we should make an attempt to grab those figures for development purposes.

Based on my experience with other coins, believe it or not, its usually an 80% windows download rate, 20% linux (1% mac).
However, I believe with BiblePay, we have a handful of grass-root linux supporters who seem to run a high quantity of nodes (IE they seem to
 have excess money laying around for hobbies, and/or have some relationship to cloudmining).  We might be attracting people who deal with excess PC resources, being the only coin that hasnt been exploited by GPUs.

Anyway, Im going to guess that out of 750 users, 70% are still PC users, but I believe personally that if you went with node count, we would be along the lines of 1000 nodes with 50% being linux nodes...  So the linux count is probably skewed due to ROI and huge quantity per hobbyist.

(There are stories on the internet of some coins that tried to launch as linux-only, and they always died.)