New survey in UK says,

64% Game Developers self-publish, of which 96% are independent studios.

52% on iPhone platform
38% on PC
36% on PSN
16% on Xbox Live

And for those who self-publish, 72% digitally distribute their games.

In conclusion, if you want your games to be discs selling at retail shops, most would go with a publisher. And digital distribution helps game studios self-publish. Nothing new here, but lovely stats for a nice Tuesday morning.