First off, I didn't state anything as fact.
Second off all, I have used GSPot, I just didn't happen to have an AVI missing aprox 9MB's from the begining lying around to test.
I just stated that given my understanding of both how AVI and GSpot work, that I doubt that GSpot would tell you anything with the entire file header missing.
As for so-called authoritive, I have never (to my knowledge on line) claimed to be an expert on anything.
I have just now created a test file, by deleting 9MB's from the start of a 700MB AVI and guess what? GSpot just says: Non-AVI File - Type Unknown. I could post a screenshot if you really like? However I can see little point.
Lastly what exactly did I do that was so bad to piss you off so much? I know that it has been going on for awhile now... Was it perhaps my comments on your DivX to DVD guide, claiming that it should be called AVI to DVD?