Sorry for the delay in answering.
Many of the current models, ( Both one and two-handed,) were designed prior to Lefty joining the TFO team. He is currently methodically working his way through the entire line of rods with an eye towards making each of them as good as it can be.
The spey rods are currently what I would call moderate action spey rods. They are light in weight, especially the 12'6" and the 14'. My suggestion would be that if you like a traditional spey action, you should try the rods out soon.
With the right line/head setup, I can cast the 14 & 15 a very long ways, ( Read: Backing knot in the guides,) but they are not as fast as I would like them to be, although I think the flex points are just about perfect.
Then again, all my other two-handers are T & T's, so I think my casting has been grooved for their speed and action.
On an almost un-related note, here is a picture of the TFO 14' 9-weight overhead casting the 8/9 Rio WindCutter on Pleasant Bay, Orleans Mass., two weekends ago. Randy Jones can throw some pretty nice loops on the overhead: