I agree, 'what are your credentials?' is the wrong question - 'where is your data?' would be better. But I too question the author.
The author is posting a list of his personal gmail bugbears. We all understand the author doesn't care that you can see the email in the reply window, he'd rather a much bigger space to write.
I think we can safely say that Google test UX changes with actual users. Asking the parent for some data to back up that most users don't like the change is reasonable.
Also making the compose full screen would result in a very wide compose area, which is widely though to slow down reading (eg, of what the gmail users has just written).
I've actually flagged the submission: evaluating UX based on opinionated users without data is simply poor.
The author is posting a list of his personal gmail bugbears. We all understand the author doesn't care that you can see the email in the reply window, he'd rather a much bigger space to write.
I think we can safely say that Google test UX changes with actual users. Asking the parent for some data to back up that most users don't like the change is reasonable.
Also making the compose full screen would result in a very wide compose area, which is widely though to slow down reading (eg, of what the gmail users has just written).
I've actually flagged the submission: evaluating UX based on opinionated users without data is simply poor.