US Episcopalian Church question

[Kathryn Cawte]

The BBC have been covering the delayed confirmation of the gay bishop by the
 Episcopal church all day. About an hour ago they explained that it's
membership is actually less than 1% of the population of the US and as such
it legally qualifies as a sect. And yet ABC news which is being shown now
just described it as one of the US's biggest churches. Now I realise that
these two things aren't necessarilly contradictory but they certainly sound
like someone is wrong. Can someone explain whether they're both right?

K
*confused*