Bias included at no extra charge

The BBC have brought back Poll Tracker and very interesting it is too, maybe now they'll also bring back Poll Watch. Anyway the Poll Tracker allows you to choose which pollster's polls to view and the BBC defaults the choice to YouGov. Why YouGov? They are alphabetically the last not the first... Could the reason be that they show the smallest gap between Conservatives and Labour in their latest poll - 13% to ComRes's 16%, ICM's 17%, MORI's 17% and Populus's 14%? Maybe there is an innocent explanation but with the BBC's record somehow I doubt it.