And that's not all that's changed with the Thomond Park he remembers well consigned to history, albeit a rich one. "I haven't been there yet. I've only seen it on telly. It'll be great to get out there and actually see it, and to get out on the pitch again."
There'll be no-one better placed to advise his charges but Williams believes there's a certain amount that they'll have to learn for themselves."I'll be letting them suck it in. It's hard to describe that kind of atmosphere, especially with the 20000 that are going to be there, it's a bit different as I've only been there with 15000 so it's going to be fantastic, the boys will thoroughly enjoy it."
Williams admits he's looking forward to the game tomorrow night. "It'll be great. It's an important step for us coming off a disappointing loss against England. These boys started off well the other week against Leicester so they'll want to keep that going. There'll be plenty of passion on both sides, our boys are gelling well together and they're going to come up against a bunch of guys that want to play for each other so it will be a great tussle."
Australia: Lachie Turner (NSW Waratahs); Rod Davies (Queensland Reds), Pat McCabe (Brumbies), Anthony Faingaa (Queensland Reds), Luke Morahan (Queensland Reds); Berrick Barnes capt (NSW Waratahs), Luke Burgess (NSW Waratahs); Ben Daley (Queensland Reds), Saia Faingaa (Queensland Reds), Salesi Ma'afu (Brumbies); Dean Mumm (NSW Waratahs), Rob Simmons (Queensland Reds); Scott Higginbotham (Queensland Reds), Matt Hodgson (Western Force), Richard Brown (Western Force) Replacements: Tatafu Polota-Nau (NSW Waratahs), James Slipper (Queensland Reds), Van Humphries (Queensland Reds), Pat McCutcheon (NSW Waratahs), Nick Phipps (Melbourne Rebels), Matt Giteau (Brumbies), Peter Hynes (Queensland Reds)