Seems there's some special commentary and presentation for breaking records this year. I got 31 assists in a MyCAREER game, and as I was getting close to the record, overlays kept coming up mentioning that I was tying fourth place, third place, etc, with the commentary also acknowledging it. When I got the record it was displayed on the big screen, noted on commentary and on an overlay, and then there was a unique post-game interview.
I'm guessing some of that presentation is also used if you break a record in other modes using a real NBA player, but in any event, I thought that was pretty cool.