Meh, I've never bought into that about the weekends.  If people don't want to post, they can justify it any way they want.  No post on weekends?  Enjoying time off.  No post on weekdays?  Too busy with work/school.  No post during school year?  Those classes are eating me up.  No post during summer?  What, can't I relax and do things at my own pace?

A bunch of people never seen roleplaying as the commitment it's supposed to be, and will take any excuse to withhold effort.  Now, this isn't always the case, as many excuses are very justified (emergencies, vacations, etc) but I'm talking about normal days.