Make sure your wings are clean. It has been reported that changing your loadout options in the preflight interface does nothing, so even if you select just guns, there is a strong chance you will at the least have some dumb bombs loaded on those pylons. Take off, fly around and unload the bombs and you should notice a big difference.

de.ci.sive.ness\ n. 1. Ability to make decisions promptly and to announce them in clear, forceful manner. 2. See United States Marine.