It is in Toyota's business strategy to first develop platforms
for the Lexus model before pushing them down to the Toyota
line. Through this strategy they reap huge economies of
scale.
That's the info I get from talking to Toyota people, not just
here but in the USA.
The Camry model in Singapore is slightly different from the one
in the USA though.
I'm mistaken about the Camry on the IS250 platform.
It should be the ES series platform, which I understand is not
sold by Borneo in Singapore for the simple reason that it looks
just like the Camry.
Try checking out these links:
http://us.lexusownersclub.com/forums/lofiversion/index.php/t29142.html
http://townhall-talk.edmunds.com/direct/view/.f123a70/0
http://www.redflagdeals.com/forums/showthread.php?t=496440
Common knowledge in the US that Lexus and Toyota share
platforms. But that's the same for many other auto
manufacturers. Problem with Lexus ES and Toyota Camry is that
the two cars look almost identical.
yes u are right.... this is what toyota is doing all
along...
the camry is based on the es
harrier on the rx
mark x on the gs
but definately the camry is not based on the is250.... 
