Outnumbered just seems like a filler show to me to prevent MOTD virtually being in the 9pm slot! At first I thought We Were Not Amused would flop, but after seeing the competition I think it could do really well. BBC2's 'The Fallen' will get >1m I think and I can't see Outnumbered doing any better than 3.5m, especially with WAMA well into its show. ITV seem to definetely have the better schedule out of the two last night.
EDIT: Also regarding ITV's XF sandwich show, it seems Family Fortunes has gone on a break to let WAMA & IAC become the XF sandwich. The final 3 episodes will probably air after IAC finishes which will take it to the end of December. I think Divas 2 was probably earmarked for a Saturday airing, but there just isn't enough room at the minute, but I can't see why ITV couldn't have saved it for the end of December when the XF finishes, because ITV really struggle until mid January? They could have:
6pm-YBF
7pm-TV Burp
7.30pm-Family Fortunes
8.30pm-Divas 2
9.30pm-Film
Though, from January ITV Saturday nights look much stronger than the BBC's which is surprise.