Several hundred sources shouldn't take that long to parse. Certainly not 15 minutes. We suspect a bug.
Does the OFIW dialog tell you VA X is still parsing?
What version of VA X do you have? If not 1440, can you try the latest version?
Can you enable logging in our options dialog? Exit the IDE and makes sure all instances and thread have exited. Restart the IDE and let run for a bit. Exit. Send us a zipped log.