Last time Southampton were in the premier they lost at home to Leicester 9-0Hard to say, I think a lot of it will depend on how long they keep Russell Martin for ( surely he won't last the season) and if he keeps up with his current tactics, which are the cause of most of their problems.
I don't think they've been smashed by anyone yet though, we'd already lost 8-0 to Newcastle and 5-0 to Arsenal (I think) by this point last season.