Is the transom bad already?

[Shrek]

I was out in Gulfport this weekend watching the challenge cup regatta and acting as a half assed support vessel. It was pretty breezy and in that skinny water, the chop was 2-3 and confused. It was like a washing machine. The boat handled OK and was fairly dry until I tried to run in on plane with a quartering sea (more or less); operator error got us all soaked to the bone, but it was a pretty fun ride.

Problem.

I put the boat on the trailer and pulled it out and while I was out of the way getting the boat ready for the interstate, I noticed two cracks on the top of the transom on either side and outboard of the outboard. The one on starboard is larger than the one on port. I stepped on the outboard and watched both cracks flexing open and closed. The rest of the transom feels and sounds solid. What are the chances that this is a simple glass repair and not a rebuild?