AnandTech's review has a much better set of comparisons to previous generation processors. (and if that isn't enough, there's always Bench)

http://anandtech.com/show/9483/intel-skylake-review-6700k-66...

Also interesting is that they found a decrease in gaming performance at 3.0ghz vs Haswell. Now, if Skylake could be expected to maintain higher frequencies than Devil's Canyon chips then the slight (3-5%) decrease could be overcome - but a Devil's Canyon i7 (the 4790k) has the same 4.0ghz base frequency as the new i7-6700K, and what looks like the same turbo frequencies.