User blog comment:Alemas2005/Administrator Performance Ratings - Two Years-2 months Later (with non-RfA Admins)/@comment-25463305-20160221174527/@comment-25595629-20160222221554

See? When you ask him to specify, he's going to give a lower score to the Admin who's likely your favorite. So it's better to just let his vote stay as is and try not to ask too many questions, lest he lower his score of all the Admins due to "maturity". :P

"Difference to  last year's version  is that you must accompany your ratings with a short explanation for them, so that we can react better to them. However, every "starting comment" has to be a rating, so that we can easily discuss things from there. AND, whole numbers only."

Yada's voting is indeed a rating with a reason:

"Well all the admins are doing their best with a strange community   5/5 to all"

His reason is that they're doing their best. 5 is also a whole number, meaning that his vote is indeed valid.