First off, could we keep the brake posts in the brake thread and not cross-post in every recent thread about your brake problems?
I checked the two leading consumer advocacy sites (Consumer Reports and Consumer Guide) as well as the NHSTA site where NA customers go to file complains regarding all things automotive. Not a single complaint regarding brakes in either the LC200 or LX570. A Google search turned up nothing either (excluding this thread and your thread on a Lexus forum). You state you're not the only one having issues. So far, of the couple/few hundred 200-series owners here, only one has stated they had customers claim they've had similar issues. If this was a genuine design flaw, where are the other owners here with similar issues? Why after nearly four years of production has this issue not been brought up before?
I'm not disputing you've had issues with the brakes on your vehicle but your situation does not appear to be the norm. There are many members here who haven't had any similar issues of the short brake life. So far, I've got 20k on my MY09 and the brakes are not even at 50% wear since my most recent service.
I suspect your vehicle(s) are genuinely defective or the quick pad wear is a result of driving habits. You stated earlier than your X6 only achieved only 9400 miles before brakes need to be replaced. That too is unreasonably low mileage for brakes leading me to believe driving habits may be more at fault than the vehicle themselves.