Interesting. At the time, I chalked up the attitude I received from JonB to an isolated incident, having not heard anything to the contrary. In my situation, I called up to inquire about Corsa exhaust, etc., but before I could say anything, he responded gruffly that he was on the other line with a customer and was I calling to shoot the breeze?, and that I should call back in 10 minutes. [If that's the call you are on is so important, why not just let other calls go to voicemail?] My subsequent purchase from him was for about $2K in various things, and while he was informative and helpful in the subsequent phone call, the attitude was still there. Could've had a bad day then, might have had another one with Adam, or there could be a customer service problem.
Not a flame, just an observation.