I'm not convinced by that, especially having the whole page gray, as is an item view, it should be white.

ok to have the section titles with a gray background, but should them having a gray background, rather than the whole page.
it looks like white things floating on a gray background, which makes it not look anymore like an item view

It's the same on the Updates page. I rather like the look of white items on a gray background when there aren't enough items to fill up the page. I think it looks kinda cool.