The Recent abundance of shows not being limited to the Fall Season

Maybe I'm crazy, but I remember a few years ago, all of the new shows would be scheduled for the fall, leaving no new shows in the spring and summer.

I feel like over the past few years, we've seen a shift of new programming spread out throughout the year. NEW shows are even being scheduled in the summer ("Monk", "The Closer", etc.) There are even new shows having their season premiere this week ("Kings").

I'm wondering why the recent shift in programming schedule. I am thinking maybe it has something to do with the increase in the amount of homes that have DVR & TiVo. I think stations are beginning to realize that not everyone watches shows at their air time, and a lot use their DVR to record to watch shows at a later time.

Anyway, thank you, TV scheduling committee (hah what if there was one?), for giving me something to watch in the summer when the Florida Marlins and New York Yankees both have the day off.