Garland,
One thing we know, because many people made a point of it after the architect spoke to us at BUDA is that a VAST amount was spent on drainage at CM. Indeed, the course drained remakably well. If you saw pictures of it on Sunday morning you would be astonished that play was possible on Sunday afternoon. I imagine it drained about as well as ANY inland course in the UK would.
As to the fact that Porthcawl was in play on the Friday (I don't believe anyone has confirmed its status on the Sunday morning), so what? Did they have 40,000 spectators on site, with the attendant health and safety issues? Do we know whether it was really playable, that is that the greens and fairways were substantially free of standing water, or whether it was merely playable for a few members playing in social matches, where standing water on the greens could be ignored?
There's a lot of nonsense being talked on this thread (and other RC threads) by people presenting conjecture as fact and half-truth as truth. The only relevant facts are that CM was not playable on Friday afternoon or Sunday morning because of a Biblical volume of water falling from the sky. remarkably, given how wet it was, it was fit on Saturday and Sunday afternoon and all day Monday. The crowds appeared good on Monday and I know many of my colleagues got to watch it, so I suspect audiences, though obviously down on the Sunday were reasonable on the Monday. In addition the amount of national press coverage it got over here on the Monday evening was pretty substantial.