It should not be. We usually do that, and most of us are happy to assist, especially if we have some expertise, but yes, the client was right… I mean, *had* right to be irritated.

Well, the problem was mostly with our phrasing of the request. We were not asking him to check if an interface was quantifiably accessible as much as whether the interface was comparably easier for them to use with a screenreader than other options.