Alabama did this for the first time in 2001, when my oldest went through and I thought it was ridiculous. The reason given was that it would promote racial diversity in the traditionally white sororities. Now that is a valid reason but I never understood how delaying rush would bring it about! They did it again the next year in 2003 a new president came in and put it back to the week before classes started, which, in my then humble opinion, was when rush was SUPPOSED to be anyway.
Well, Ole Miss has a delayed rush, reason being that girls who don't get what they want would drop out otherwise, and for some reason pertaining to the football schedule rush was delayed until the 2nd week of October last year.....after experiencing a TRULY delayed rush I have changed my mind. The 7 weeks she had to get settled, make friends in her dorm, meet some sorority girls, plus living with the notion that she had to be on her very best behavior

turned out to be very good for her. We were dissecting Alabama's rush last night (some of our local girls are not very happy, both pnms and actives) and she made the comment that delayed recruitment made so much more sense. This year rush is the end of September and I find myself thinking that waiting another couple of weeks might be a good thing!
Just my 2 cents.