Is their now a 'big 7' in the PL?

Back in the mid 00's Chelsea, Arsenal, Liverpool and United use to run away with the top 4 places and 5th was the 'best of the rest', but last season the top 7 of those four teams, Everton, Spurs and City were miles ahead of the rest in top 7, was that a one off, or is their a new top seven forming in the PL for the foreseeable future?

I say that because i don't think the teams from 8th down are very good, you could say Swansea, but for every good result they had last season (Arsenal away) they had an absolutely terrible one (Fulham at home) and i just don't think their are any teams below last season's top 7 that are capable of putting winning runs together like the top 7 teams could.

Southampton have had a good start, but so did West Brom last year, Fulham would have probably been the best bet if their current squad were a few years younger but their squad seems to have hit the famous father time.

So basically, is there a new big 7 in the PL? and if not, who out of the other's could get in or even challenge for a top 7 place?