I think another reason for the tepid responce is that for this jet to work for a given major, they'd need to commit to a fairly large order. I don't think anyone wants to be the carrier doing the "ice breaking" in regards to the usual teething problems new designs usualy have, at least not when there are other alternatives and there are. Additionally, lending by banks, etc. is tight right now, so financing may be an issue and of course as already mentioned, the price is high relative to established competition.

All things considered, I'd not expect a current legacy to angle toward this bird for the time being and it will be up to a regional to make the smaller one viable. This design could be a player 5-10 years from now though.