Funny thing, my friend has the suspension in "sport" all the time. We were driving around town with less-than-perfect roads, and I noticed it. He's like "oh I like it this way. I just leave it on all the time." I noticed that even in normal D, the automatic shifts instantaneously and way faster than the 6AT in the 325i.
It's interesting how BMWs give the driver more confidence all the time. He was dodging around traffic, something he never really did in his TL. And the sad thing is, he had spent a good dose of money on putting the A-spec suspension and some other mods.........and now he likes the X5. It reminds me of those Avis commercials running on TV.