Bax I think the problem isn't one of the stabilizer/elevator stalling out, it is more the wing is pushed to a high enough angle of attack to stall but it still has a large velocity (dynamic pressure) which combine to cause the viscious snap roll, the cases that I have seen the snap is up with roll. If the wing lift goes away then the down loaded tail (especially with the up elevator commanded) certainly increases the nose up pitch.

Even a modern pattern ship which flys level with a up load on the tail will have the down load in the case where the airplane approaches the high speed snap. At low speeds and level flight the tail load is up and when the wing stalls the nose just drops due to that up load.

Dick it certainly is interesting. The low linear and angular inertias certainly have a major impact. For the maneuver you mention there is a good chance the airplane rotates fast enough that the wing never approaches the stall angle of attack even though it has the huge elevator deflection. Low Reynolds number and light weight along with some flow diverting thrust effects get together and make an interesting result, and it is a heck of a lot of fun to play with. You know better than most that the big monsters are a treat but there is something really relaxing about flying a little foamy just a few feet off the ground and doing outside loops.