Aha!!!....no, I think I would rather stick with the vertical
BTW..... Ray if you are looking, I cant speak for anyone else but in principle I would pay double - if the other vertical owners would, to do away with the buttons, and stick with just 5 verticals.
Alternatively,, if on every refresh, 5 verticals were permed from 10 in random places, or even 15 in three columns alternating (preferably randomised) , that would do me just fine. In fact it would be better for all advertisers than a fixed because it would keep the visual changing.
Conversion would be unaffected, because of the degree of repeat use.
Im wholly against 5 more verticals in a column of 10 and I dont like the look of alternating buttons or verticals - so switching verticals is best??