That's very disappointing nicksan........Lexus Canada does not operate that way for their CPO program at all, in fact they even replaced the 'B' pilliar mouldings & the drivers side heated mirror element in addition to making sure all service & maintenance was up to date.....all billed to Lexus Canada!
It's not like you asked for the previous owners name, address & shoe size here, you just wanted to know if all service & maintenance was performed in a timely manner.....a simple yes or no answer.
Let's put it this way.....you keep all paper work that proves that your ES is in fact a Lexus CPO vehicle......and maintain it according to the owners manual. Should you have any problems let's say with engine gelling......Lexus will have to replace & install a new engine at their expense.....not yours. I suspect you are OK however. If you haven't done so already, I would switch to synthetic oil from now on when doing oil changes. B) I hope you have trouble free service out of your ES, especially considering the low mileage.
Don't forget to register your ES online on www.lexus.com so they have the record of you & your ES.