As for Alton asking for the Video to be taken down is like shutting the stable door after the horse has bolted. It was an embarrassing video, lets just hope that the actual speed of it is faster than it looks when riding it, otherwise we just have kids rides available for ERT
I have to disagree with the point you've made about the video being 'embarrassing'. It may be the case that the speed appeared slower than some were expecting, however you simply cannot get a true judgement of the speed from an aerial video. As many people have already pointed out, the ride would have been running cold, the wheel compounds would most likely have been just one of several different ones they are testing, the weight distribution of the dummies will have played some part, and there will also have been a number of other factors to take into account too.
I think it would be fair to say that most of us have been more than aware for a while that this was never intended to be a full on thrill ride like The Smiler or Nemesis. What I do hope we will have is a great overall experience. The overall theme, pre-show and effects have the potential to combine with the ride itself to create a complete package and a a great overall ride experience. It may be that the overall speed has been judged to ensure that guests can get the full impact of any effects that are triggered during the ride.