I'm running Eclipse and the emulator on a 4 year old Mac Pro. Initial startup time for the emulator is about 20 seconds, but after that first hit has been absorbed, it generally takes about 8-10 seconds whenever I run a new build of the app I'm developing. (This is with HAXM [0] enabled. Still far too slow, so pretty much everybody does their development on actual Android devices, but far from the times reported in this thread.)

[0] https://software.intel.com/en-us/android/articles/intel-hard...