The phrase "more polite than" is correct and usable in written English.
You can use the phrase to compare two manners or manners of speech. For example, "His response was more polite than hers."
Partly due to the need for translation, and the politics of consensus in the chamber, debates tend to be calmer and more polite than, say, the Westminster system.
But mostly the performances were more polite than supercharged.
Definitely much more polite than the French crowd".
So, are Southern men more violent, or more polite than Northerners?
Response was more polite than enthusiastic among members of the news media.
They are more polite than the Americans and not as dangerous as the Shia militias".
There were a few words exchanged, but they looked more polite than profound.
He was more polite than the others, more sort of smooth and smiling.
Montgomery laughed at the memories, insisting he was more polite than Rendell.
New York could be more polite than usual for another reason.
What could be more polite than wanting strangers to live longer, healthier lives?
