I think it has to do with time and how Linus wants to spend his resources. If you've got small OS project you would be happy with every feature or bug fix and p

I think it has to do with time and how Linus wants to spend his resources. If you've got small OS project you would be happy with every feature or bug fix and probably wouldn't complain about the format of a pull request. However Linus is heading a huge project and besides that he is famous as well. Everybody wants his time, if only to show an e-mail in which he flamed them to death or to brag they got a commit into the Linux kernel tree. So it is basically a matter of respecting his very limited resources.