Scott Aaronson discussed Integrated Information Theory in 2014. His conclusion was that it is a failed research program. [1][2][3]
[1]http://www.scottaaronson.com/blog/?p=1799
[1]http://www.scottaaronson.com/blog/?p=1799
I'm super impressed, as in, the internet is actually better than I thought! ;) I would really recommend to anyone interested in that discussion to take the 3-4 h it takes to read through it all.
"But let me end on a positive note. In my opinion, the fact that Integrated Information Theory is wrong—demonstrably wrong, for reasons that go to its core—puts it in something like the top 2% of all mathematical theories of consciousness ever proposed. Almost all competing theories of consciousness, it seems to me, have been so vague, fluffy, and malleable that they can only aspire to wrongness."