First of all, he didn't come out of nowhere. You said yourself he has been here for a year, so that puts him here 3 times as long as you.
He didn't "make up a name". He is a name that is well respected in other comminities, for not only his husbandry,but his attention to detail, and ability to selectively breed like no other.
I dont think you have to believe him. I would hope that you would not skip over all of his posts because you don't like what he said in one thread though. I think there is a lot that can be learned if you can take off your blinders.Perhaps you could teach him a thing or two along the way as well.
I love that one of your criteria for being credible is that he has to have a site. I can think of a few names that everyone knows that had websites that weren't exactly the best to get info from, or to buy animals from. I am sure the BOI contains a few more than I can think of!
As for his 18 posts...Posting does not equate to knowledge. There are people here who have more than 470 posts in 4 months, and looking back at some of those posts, I wonder how many it would take to add up to what Chris has added with his.
Think what you want. If you want others to guide you in your thought process, you may be in the right place!