gruber linked to this on what Apple currently uses as their formula (neat graphic included): http://fscked.co.uk/post/754590440/this-infographic-hopefully-shows

gruber linked to this on what Apple currently uses as their formula (neat graphic included): http://fscked.co.uk/post/754590440/this-infographic-hopefully-shows-that-im-not http://fscked.co.uk/post/754590440/this-infographic-hopefull... AT&T's formula must be not so heavily weighted towards 5 bars as what Apple is currently using.