I think the question of server speed was derived from the following logic:
"GR, WG, FB operate three game months per real day. They have apparently had the processing power to do this for the several years they have been open."
"Server technology has advanced in that time, but the speed of game processes, therefore allowing W3C to increase the passage of game time, did not necessarily follow. Therefore, have the servers been upgraded recently?"
Admittedly KB has sped up recently, but it might have been a fair question for the other servers, With W3C's recent announcement that shares trading would process continuously throughout the game month, instead of getting shoved to the latter half of the month after the "more important" processes had concluded, it might be reasonable to assume that W3C has chosen to allocate increased server resources to shares trading, rather than speeding up servers.
Admittedly, speeding up a world from 3 months per real day to 4 requires a very substantial increase in processing power, all at once...