I've had the pleasure of operating the A321 recently after about 2000 hours A319/320 at other airlines. I have to say I prefer the 321, certainly to the 319 and possibly even the A320 in terms of being able to grease it on. It is subtly different, the approach speed is slightly higher and that results in being able to drive it on that much more. I've not been close at all to smacking the tail yet, whether that's because of experience or not I don't really know. I think a competent pilot just instinctively knows when the nose attitude is looking a bit high and knows not to go any further. This is something the cadets possibly haven't had time to develop and their landings in the Warrior and Seneca may still be fresh in the memory hence the temptation to pull full back stick.