There not biased against. They just want to sell Sony and MS stuff. Under there impression Wii stuff sells itself so why should they bother. Though some games could use it regardless even on the Wii.
Squilliam: On Vgcharts its a commonly accepted practice to twist the bounds of plausibility in order to support your argument or agenda so I think its pretty cool that this gives me the precedent to say whatever I damn well please.