That was a true statement, and a valid concern back when the decisions they reference were made...I think there's a context issue here, either at LaNeve's fault, or the publication.
As for diesel itself....the new diesel emissions standards require these engines to be approx. $4000 more expensive than a similarly-powered gas engine...plus...coupled with the traditionally higher price of diesel, and a perceived dirty/noisey characteristic of the engine....not a lot of American consumers favor it.
I still think they should do it. Push hard into the market, and advertise like the devil...it'll catch on eventually, and they'll be the go-to company for it.