Mark,
the rotation rate and that fact that there was no massive acceleration onto the roll after pitch up causes me to still believe that it really is an aileron roll - 70kts after pitch up, by the times the wings go knife-edge the first time lift has dropped dramatically. As they go inverted with high alpha, they'll get a wee bit of lift and suddenly they are knife-edge with the nose slicing through the horizon, wings level - oh, look nose down......
notwithstanding the above - a sweet vid