I think this is pretty normal. Logic Pro X runs slower than Logic Pro 9 on the same computer as well.
GUI and CPU craving eye candy is the thing in demand these days it seems, and it is taking it´s toll by slowing down apps and making them un-snappy.
Could be a bigger problem hotting up apps relying on “old” code and that need backwards compatibility.
The GPU/CPU demands are not increasing in a linear fashion in relation to the increase of CPU/GPU processing power either it seems.