How fast are the greens at the open championship?

The R&A doesn't generally make them as fast as the USGA likes for the US Open, but depending on how Mother Nature behaves they can go either slow or fast.

Here's a quote from a caddy that works at Royal Lytham & Saint Anne's (follow the link to read the whole thing... pretty interesting):

"Putting at Royal Lytham is about pace...which varies immensely on each and every green. Temperature, humidity, time-of-day, and especially wind direction/strength, are fundamental components of your reading. There are only around 4 greens on the course where directional extremes come into play".

If it helps, for the Women's Open Championship held at RL&SA's in '09, the greens read at 9.5 to start the tourney, but did slow down a bit after a brief rain Thursday night/Friday Morning (second link).

Imagine putting on curvy marble slabs