This is fairly close to a number of posters expectations. ie, the aircraft maintained idle thrust while flying down the approach untill the stick shake went. It is fairly common to have idle thrust during most of the approach, however you would also expect it to spool up by the time you are configured.
The big question is why didn't these guys not notice it hadn't.
With regards to all of this hands on bull, the problem here was a failure to monitor the speed & thrust, I doubt that a hand on the thrust levers would have made a bit of diference.
I am not going to join in the blame game, there are plenty employed to do that allready, I just hope we all learn a bit more from this one and with a bit of luck it won't be repeated.