Posted on twitter that it could be a deterrent, but turns out, a dollar difference probably won't be for the great majority of already convinced followers who purchase the CDs. If a buck makes you go download the torrent instead of buying the album, methinks you weren't that into it to begin with...
+ no plastic, who can argue with that?
You're already putting out some special packaging / format at times (the box set with Marcus, Twenty Ten, etc.) which is fairly daring in the current market. Obviously I have no clue how well you're doing on those margin wise / how fast they go, but assuming those reach your audience and reap in enough cash flow, I have a hard time imagining a dollar difference would suddenly make people flee.
I revise my earlier position and say go for it!
(and the poor shmucks like me can still wait until end of summer sales and the like)