I'd hope so for the sake of the franchise's future, but I expected there'd be enough relative newcomers to CFC who had only ever played Civ5 and voted for it to give it more votes (% wise) than it has currently.
Even if the poll asked, "Which of these Civ versions do you like best?" and left out Civ4, it's not certain that Civ5 would win. True, it may be that more than half of the Civ4 voters would choose Civ5 as their second choice, but looking just at first-place votes, Civ5 is getting trounced even without Civ4 (26% of the Civ1/2/3/5 votes are for 5, with 51% for III and 21% for II).
I don't think it would either, but I think that's largely to do with the poll being conducted in OT rather than being necessarily an accurate representation of opinion (I don't know how accurate it is). OT hasn't really had a large influx since Civ5 release. If you look at the votes of members who've joined since September last year, this is how they go:
Civ2: (1) Clement
Civ4: (16) Choeimok, Civ'ed, JohnnyW, jtb1127, kossmikman, LostInTime, markusbeutel, MeowTau, moosenukes, nato2101, pob, SuperJay, The_Tyrant, totalepicness, TPQ and Yoshiegg737.
Civ5: (13) aatami, blac, DefenderofIslam, Gordon Brittas, Hamburger, Keejus, lordsurya08, Revoran, Save_Ferris, Tabarnak, The_Quasar, Wir0s and zappenduster.
That's a fair less pronounced discrepancy between Civ5 and Civ4, and Civ2 and Civ3 are pretty much completely unrepresented. I think my point here is that what we can perhaps assume to be relatively newer players do vote quite a lot for Civ5, or at least for Civ4 rather than Civ3 or 2.