I took in my Sherman Jumper to the LBS to put in my new spring. The guy working there in a smart ass tone said "Does that thing have air assist?" I said no. He said "Oh, well thats ****, you're going to trash that thing." I thought it was an ass hole comment but he really didn't have anything positive to say. Also, about a IH Porter being a XC bike for bigger guys. Is it true about the air assist though?