If we are to take 100.000 votes for Helen as an accurate overall figure it means 47% were cast during that short final voting window.Although a much lower % if using Eugene's calculation.
I don't think the "100,000" figure bandied around for Helen can be trusted to be remotely accurate. I've already commented on the reporting of it by Telemix and others. As I recall it, what she said was that she'd been told she'd got over a hundred thousand votes. You have to remember that this was Helen - caught in the excitement of winning - passing on second-hand information that she'd been given during the fuss surrounding the final show by a member of the production staff. It's just a ballpark figure...