Looks to be a Good Guide....

Haven't had the chance to read the whole thing yet, but I will. Until then, this is what I'm talking about:

Link (Or you can click on the title)

Blurb:

6. Harshness and critique

This is an unending debate. Let me begin with what I consider to be absolutely unacceptable: personal attacks, racial comments, sexist remarks, and other such idiocy. This is called rudeness. Rudeness is bad. It is different from harshness, because harshness usually has a point and if taken in the right way, can work wonders.

Now, should you be harsh? No, I don’t think so. Firm is better than harsh, but a very fine line separates these two. My rule so far is: if you can’t take someone giving you a critique that is harsh, you certainly shouldn’t be offering a harsh critique to someone else. This said, I would say that harsh critique is acceptable. “Go read a book,” is critique and good critique at that, no matter how much it stings. I would suggest not phrasing it in the same way, and in the event that you feel it is necessary to gear the writer towards better writers, suggest it carefully. Ask what kind of books they read, how often they read, and so on. Suggest books that you think can help them.

A couple of things to consider:

The maturity of the writer: It is important for you to know beforehand whether the writer is capable of taking your criticism or not. Since this is hard to gauge over the Internet (unless you are already familiar with the person whose writing you are critiquing), it is safer to avoid harshness of any kind.

We’re talking about deviantART: There are no moderators who will come swooping down to defend your harsh critique. There are GDs, staff members, and other influential types, yes, but the vastness of the site prevents them from noticing every little quibble.

In conclusion, be honest and firm; try not to be harsh, unless absolutely necessary.

Extra reading:
A discussion at *Amberlouie's journal about harshness in critique; this is my rather personal opinion on the matter

Now this is from deviantart.com and yes, it's based on critiques there, however a lot of it can be digested and diverted into other areas of life. Email critique, blog critique, one on one critique... grad school critique. :)

Chris. You are mean.