I too think the 50/50 is a bit off. I think maybe 60/40 (in favor of US) is more realistic, though still not super accurate. Would a poll get a more accurate number? Yeah. What would an accurate number result in? Not sure. With both numbers being so close, either location for the server will still negatively effect a good chunk of players.
I doubt storm just said 50/50 for the hell of it; I assume that he said 50/50 because its pretty even between the two sides; I don't think he literally meant it was dead even.
Maybe we can all pitch in and buy a boat to sail out to the middle of the Atlantic and put the server there. Then on the playerlist it'll say: npcserver(On a Boat)