They are controlling the speed by how fast the blinds move up. If you look in the lobby a regular tournament may have 10 min blinds, turbo 5 mins blinds, hyper 3 min blinds.
This matters because in a regular tournament you have lots of time, you have a far better chance of being successful as a TAG player because you can wait for your hands and pick your spots.
In a turbo tournament, things change quite a bit. Very often the levels go up every orbit. While this doesn't seem like much when the blinds are 10/20, once they get bigger it certainly changes the dynamic of the game.
Speed of tournaments is about blind changing ....If blinds are raising fast for example.Hyper and turbo tournaments are faster than regular.I prefer turbo and hyper MTT because it is fast and you got a lot of value if you win .
Yup, as many others have already said, it's blind progression levels. I vehemently try to avoid hyper turbo's. If you have somewhere/something else to do, I would take a chance at trying them, but they generally end within 3-4 hours depending on the capacity of people in the tournament, but after the first two hour mark; it becomes an all in shove party.
the difference would be the time in which the blinds change, which in my opinion influences the pressure that the player would have to win chips, the hyper tournaments that I have seen play them push-fold for the need to win chips, the tournaments that time regular the player has a little more chance to get further in the tournament