I complained to my LBS about the tire capacity issue last week. He tried several times on Friday to get an answer from Trek, without success. (Telephone tag.) He's a fairly large Trek dealer, so I would hope they'll eventually talk with him. Trek should have contacted its customers about this. It shouldn't have been something we "happened to notice" on their website.
I actually think the problem is front derailleur / rear tire interference when using bigger tires. But, either way, there's no excuse for this.