My view is that there is no need to speed up 95% of players.
It is not the 95% of players that take a minute once an hour that are a problem. It is the other 5% that take take 30 seconds every hand. Generally this is because they are so engrossed in their iPad, mobile phone or whats coming out of their headphones that they don't even look at their cards until it is their turn. Even then they often have to be nudged.
I don't see that punishing the 95% is particularly fair or even useful. Why should the guys who take less than five seconds every hand be given less time for the one hand per hour when they need a minute. At 25 hands per hour (estimate), the guy who takes 30 seconds every hand uses 12 & a half minutes while the guy that uses only two minutes per hour is denied one minute when he really needs it.
If there was a fairer way where each player had an individual clock with a total allotted time for the whole tournament, or per day, or per session or per level as in chess then fair enough but I think this would be difficult to administer.
I like the fact that DTD are looking at ways to improve the game but feel this is very much a case of throwing out the baby with the bath water.