Good for you!
I had my PI full-finger gloves for all of a month when they started to fall apart. I've darned them several times and after reading your post decided to take them to the LBS and see if I could exchange them or something (have had them about 3 months now). No dice. They said PI's are very good quality and they've never seen anyone wear through them like I did. Also, that I shouldn't expect any gloves to last more than a season. So, I asked, how long is a season and was told 4-6 months, so my having these for three months is just shy of a season. They gave me recommendations on some heavy-duty mb gloves that I could buy.

Walked out and will buy at the other LBS down the way - I buy everything there now - even though they are a bit more pricey, they have awesome customer service.