I don't think so, as much as they may deserve it (and Nintendo deserves their fair share of the blame as well). It looks like 3rd parties are finally getting what they wanted and expected, although it took much longer than they thought it would. They thought if they (mostly) ignored the Wii, it would go away. Now it seems that's finally starting to happen, and the other two consoles are playing the role of the as-yet-nonexistant next gen to some degree, picking up customers that are moving on from Wii. But publishers probably thought it would take a year or two to starve out the Wii, not four going on five.
It will be interesting, though, for sure. The market right now is certainly not the paradise that the PS2/Xbox/Gamecube offered.