Thursday's not too different in my opinion... weekend is almost upon most people. Thats the day I figure stats would be slowly increasing for the big weekend rush.
My stats show a surge on Mondays and peak on Tuesdays while the rest of the days, it will be average and Saturdays and Sundays usually have less than average traffic. More people go offline during weekends?
A lot of my friends and family typically go online more during the weekends. I know I am online more on the weekends...