I don't know whether I agree with it being "kitsch" or not since I haven't played it (and I've no intention of playing it). In the past I've argued against the claim by Mr. Moriarty that games can never be art, however, if it is to art it will have to be a different form of art than say, a Van Gogh painting. Furthermore, I also suspect that games that may popularly be contenders for the title of art will be ones that didn't set out to try and be just that, but rather somehow touch upon that status through happen stance via the developers' love and polish for their game while aiming for different goals.
I do know that from the get-go I found the premise and setting of the game dull, drab, and boring. I fully expect the actual game play to be equally tedious and will thus steer wide clear of L.A. Noire.
"Unfounded optimism is no worse than relentless pessimism."