No it doesn't matter which console is in 2nd or 3rd they've both secured 3rd party support until the end of the gen.
Don't bother arguing about exclusives looking better than multiplats could, its pretty much a fact. The 360 and PS3 have vastly different strengths when it comes to the hardware so to get an equivalent result on both you need to limit the overall vision for both. 360 games are capable of better textures, more shader effects and better AA for less cost. PS3 games have some extra horsepower for physics and more room for fine tuning and tweaking of the engine. When you consider the strengths of each then its clear that sometimes small sacrifices are made to keep games equivalent.
I would add that I think there are many multiplats that more than hold their own against the best both Sony and Microsoft have to offer.