I haven't claimed to present any other reasons supporting the 13x13 board. You have, however, claimed several times that the 13x13 board is WRONG and there is no reason for it. Yes, i realize this was before it was brought up that WebTV users need the smaller board to play. Are you now claiming that the 13x13 board is acceptable on this site for that reason?
I'll give you an example of the game i know - Line4. Everywhere i have played it, an 8x8 board has been used. I have become used to this size of a board, and would probably be lost with a different sized board. However, it would not bother me in the least to play it on a different sized board - 10x10, 6x6, 7x11, whatever. I would like to try these games to see how they work. If the game is completely different, what's wrong with that? It can still be a worthwhile game to play.