Great reasoning. Here's a quote from the Joel discussion board.

http://discuss.joelonsoftware.com/default.asp?biz.5.470472.11 "This is from a P.R. pro. Monday is the day that most announcements go out. You still want it to be early in the week but to avoid the crowd, it makes sense to do it on Tuesday."

The odd thing is everybody followed this advice it wouldn't work. So the sluggish Monday idea is pretty compelling :)