Is this really concept art of The Avengers' Quinjet?

Longtime readers of The Avengers will be looking forward to seeing the live-action realization of the "quinjets" the superhero team is always zooming around in. We've been looking forward to seeing how this would look in Joss Whedon's movie version — and now, there's a piece of purported concept art online. This art comes via Russian site Spidermedia.RU — is it real? Hard to say. It certainly looks like a quinjet. In any case, it's a nice zoomy picture for a Friday afternoon. [via Coming Soon]