Lets not forget, if he wasnt with us would we have players such as Koosh, Bridge, Vicente etc playinjg for us? I doubt it.
Now this is a question which has a few angles.
If it's do I think Gus can get us to the prem? then I aswer ABSOLUTELY YES.
However, if it's "Do you think we will get to the prem, and gus will be our manager when we do?" then I'm not sure.
If he stays, we WILL get there. It's whether he gets a great offer elsewhere that would be the only way I can't see it happening.
Have I made that more confusing than it needed to be?
Do you think he'll really get a "great" offer without having got us promoted first?
Perhaps not, but there are a few clubs who I think would be happy to dip into this division for a manager who are appealing.
West Ham, Swansea, Norwich, Villa maybe even Everton after Moyes.
Of course, I may be completely wrong in listing those teams and they may want proven top-level management.
To answer the original question in my opinion of course we can, and we do seem to play much better against Premiership Clubs.