I own several of their shirts, and although there has been some shrinkage, I would say it's minimal (I've only washed gentle/cold, and hang dried, FYI).
As far as wrinkling, all the shirts I have stay pretty crisp, and just need a quick pass with the iron to get smooth again. I don't believe they use any kind of non-iron treatments, which is a plus.
I agree...I always wash cold on gentle cycle and hang dry and run an quick iron over them. The material is very good and shrinkage and wrinkles are minimal.
Here's a referral code for $25 off your first purchase: http://www.ledbury.com/anatomy?ref_id=313 You'll receive a promo code after you create a new account.