I had the privilege of tasting the 2010 a few weeks ago in Fleurie and I thought it was a really nice bottle of wine, albeit one that will require a lot of time to show it's best.
I guess one could accuse it of being slightly more opaque than the tardive, but I didn't feel the wine was in the same level of ripeness/extract as Foillard 3.14 or Cuvee Marcel Lapierre. It's big, yes, but I think that has more to do with the really old vines (though you definitely get some textural difference from the barrique).
Alain Coudert seemed to express a preference for the 'regular' two bottlings of Clos de la Roillette, but seemed proud of the Griffe (which is named for his father). He mentioned that he thought the other bottlings of Roillette seemed to show more 'gamay' qualities and he worried about the influence of the oak on the Griffe.
That said, we got some of the Griffe to take home (partially in the knowledge that the tardive/normal bottlings are easier to come by) and I look forward to drinking it at some point (fairly far) down the road.