This is an interesting article (for me).
I find it strange that Frontier is hailed as the only U.S. airline that is totally Airbus. I agree, it is true, except for their feeder regional jets, I think that is Horizon.
It's just the B6 had an all Airbus fleet at the time of the article, even though the ERJ's were on order.
I don't know, I just thought it was a slight blunder or whatever you wanna call it on Airbus' part. Kudos for F9 saving $11 million a year and absolutely nothing against Frontier.