The Talon blanks come in a variety of actions from really slow to a bit faster than medium. I would avoid the really slow ones (they call them spey blanks) and stick with the Euro (they call them fast Euro action). The so-called custom blanks sold by several well-known companies that sell rod making supplies are actually Talon blanks.
I've only seen one on a river, a 13 foot 9 weight traditional model. It was not a bad rod, although quite a bit slower than I like in a 2-hander. The blanks are warranteed by Talon for blank defects. Talon is also a company that was started by Gary Loomis right after he left Lamiglas. It was originally known as Loomis Composits, Inc. After Gary left to be the sole proprioter of rod company and started G. Loomis, Loomis Composits, Inc. produced a series of fast action rods and blanks known as the Talon series. This then became the companies name a few years later. They make a good product.