Hiya.
I created a fresh unit test project, with one test, which had a reference to a class library project. All was fine, NCrunch did not take long at all to process the build.
When I added a fakes assembly, and did the tests again, there was a bit of a delay, but not close to the length of the other solution where I experienced the lengthy waiting. I will keep an eye on this, but it could be my other solution is a one-off, in that there is something about it that causes the delay. It's not a complicated solution at all, but it could be Fakes related that it takes so long to run.
Cheers.
Jason.