Although I am an AAdvantage Plat, I do most of my flying (and qual) on AS. I fly generally 1 to 2 rnd trips per week on AS, generally SFO-SEA, with sometimes SJC-SEA routing.

I have not been impressed. As with anything else, I'm dealing with a small sample here, but I've had 3 mechanical delays in the last 6 weeks. A couple have lasted over 2 hours. I continue to fly AS because of their AA affiliation, but compared with my experiences about 5 years ago (when I was in a similar situation, flying AS frequently), clearly the on-time performance has decreased in my opinion.

Regards,
Ryan