Coming in late to this party, but I just found this thread.
My wife's X3 was made in April 2012, so it should have the later software. I don't drive it often, but the tip-in delay drives me nuts every time I do. My poor dogs are tired of being tossed around in their crate! I'm definitely going to inquire about this service bulletin when I take it in for the oil service in a few weeks.