This seems to be confirmed by this morning's article in the Independent:
http://www.independent.co.uk/sport/football/football-league/poyet-sacked-by-brighton-as-the-tv-cameras-keep-rolling-8670398.html
I can certainly see this bringing him in to loggerheads with Barber - and it would explain his 'have we reached the ceiling?' comments after the Palace game.
Don't expect the Argus to reveal very much, especially if Gus is going to appeal because there is still everything to be contested for...