Now, assuming that the player populations are of equal size, with equal numbers of hours played...
That may be quite an assumption, since the hours played since team actions have counted towards unlocking the map isn't listed (at least it wasn't when I checked). Considering that BC2 is a bit of a darling on PC in light of Activision's actions of late, it likely has a much larger portion of the online population on the PC than the consoles (where most players are probably playing CoD, Halo, or Resistance/Killzone). That being said, PC gamers are still faring a higher actions per hour rate since launch, but with the possibility of a larger population on PC it's likely this was never going to be close.
"Conversion, fastidious Goddess, loves blood better than brick, and feasts most subtly on the human will." -- Virginia Woolf, "Mrs. Dalloway"