So yesterday I experienced a "spontaneous failure" of the BB30 bottom bracket. Bottom line, lbs says it's fried and needs to be replaced. I know there has been a lot of discussion about BB30 creak, but has anyone else had this spontaneous failure happen?

A little background: This is a 2013 10 5 that I've been riding since last July. Not sure how many miles as I don't have a comp, but I'd guess around 1500 miles. I've had no problems whatsoever and the bike has been ridden in fair weather until last week. Wednesday I got caught in a storm and was in very heavy rain for the last 10 miles of my ride. After the ride I pulled the wheels, wiped the bike down, cleaned and lubed chain, and put the wheels back on. No noise or anything from the BB30. Yesterday was my first ride since Wednesday and a few miles in there were three distinct ticks per revolution on the BB. I rode a bit further before deciding to turn back as it seemed to be getting worse. By the time I arrived home, BB sounded like rice krispies. Went straight to the lbs and he diagnosed it instantly. "You'll need a new BB" - not covered under warranty unless it's actually the shell in which case they'll replace the frame. He said they've changed quite a few BB30s and only seen the shell bad once. So, $50 for the stainless steel or $250 for the ceramic, and I should have the bike back in a week.

Tech at the shop said it's too soon after riding in the rain for that to be the cause (which it shouldn't be anyway since it's a sealed bearing). He said if the cranks were loose they could cause accelerated wear, but the cranks are snug. So, he said it's just "spontaneous failure". Anybody else experienced something similar? Or have any other theories on what might have happened?

-Tyler