My first ever contact with the world of GCA was I think at the Walker Cup of 2007 at RCD, but sadly I can't make it this year: I was in St Andrews last week and played TOC and will be there again in late-September but three trips in six weeks is pushing it! The Old Course last week was as Jason and Mark describe, and the greens will (I suspect) be a bit slower than some of the US team are used to. As ever a huge amount will depend on the weather.
In terms of WAGR etc the GB&I team is massively up against it. But there is at least one Welshman (and a Welsh Captain of the R&A, who was himself a winning Walker Cup captain in 1995) in the side, to help spur them on. 1938 and 1971 saw British wins at St Andrews - interestingly the last, 1975 match was switched to St Andrews from RCD quite late on, a consequence of The Troubles in Northern Ireland.
Anyway vv sorry to miss you all, and enjoy!
Richard