People in these positions (e.g. Torvalds) are generally extremely opinionated (which is good, because it can provide direction to a project in its early days), but have also spent years listening to people without sufficient skill or experience attempting to provide ideas, patches, or commentary that they're not qualified for.

At some point, the effort of letting someone down gently fifty times a day gives way to a curt but efficient form of communication.

In this case, GvR is just laying out what he sees as issues, take them or leave them. If you don't care for his opinion, fine, if you do, there you go.