Actually, somehow i start to miss the times when this forum was full of threads like this. :)
To answer your question, no. Of course there are differences in population, but generally you´ll find all countries / languages / time zones on all servers. I´m on Fenrir, and while population is generally low atm (jp prime 1k+, NA prime 500+, EU prime 0+lol), you should still be able to find at least a social LS.
I doubt other servers will look vastly different.
Hope this helps!