I had my car setup at STS tyre pros a while back, these are a big chain with many branches over the country. They also have an agreement to setup to WIM settings.
They phoned up Tony Bones for the settings and set the car up.
The guy who did it saaid to me that they had recieved a manufactures update a year or so ago and now there settings where almost the same as WIM, they had a corghi alingment machine.
It seems that now the IS 200 300 is older Lexus have quietly agreed that WIM settings are best for the car, so anyone with upto date settings should be ok to use.
Kind regards
Russell.