Let's say you request a full. The author sends it to you and for whatever reason you reject it. How often (on a requested ms.) do you do a form rejection as opposed to stating the reasons for rejecting?
If you sent a standard form and an author asked for more information so they could improve on their next manuscript they sent you, would you respond?
(But then again. Who is Jeff really?)
It really depends on what else I've got on my plate at the time. Publishing is more than just a vehicle for putting food on my table. I am emotionally invested in helping authors succeed. (Why else would I do this blog, relatively faithfully, and for FREE?)
If it's a great read, but not a good fit for me, I almost always say so. I try to put one or two personable sentence on the usual form letter to encourage the author to keep trying.
If it needs work and I've got the time and I can capture the problem in a sentence or two AND if it's not LDSBA time or Christmas rush, I try to let them know
But if it really needs a lot of work, I assume that a few quick pointers wouldn't help because if the author knew what I was talking about they would have done it already. And it's not my job to teach an author how to write.
Sometimes when I've rejected someone and they're particularly rude about it, I'll just send form letters to everyone for awhile. Until the sting goes away.