If you are in the upper 2k dps range than elitist jerks is not the right place for you to work on improving yourself. For one, they only theorycraft the current highest level of content, and gear and specs scale so wildly from the start of an expansion to the finish that you are not going to get any use out of that.
Your damage is low relative to the current content, but may not be low relative to your experience. I would guess that you are new to the class, in which case, you aren't really in a position to criticize an otherwise well respected class mechanic theorycrafting site.
In your case, I would actually turn to the official wow forums DK board. It seems today everyone tries to get fancy and find some underground site when really there are always people eager to answer your questions on the official boards. Its actually a great tool for learning about a new class.
EJ is a hard place in an increasingly soft wow community. Its the best resource for bleeding edge content, but if you are a beginner and you have questions, ask them elsewhere. Like I said the wow class forums are actually quite good!