Sorry to hear that you didn't get into NYU! You should keep pushing and apply again!
I do think that how long you are out of school plays a role into their decision. I was very anxious about applying to NYU because I am just two years post-grad as well. I felt like that was the weakest aspect of my application.
Here are my stats and reasons I think I was able to still get into the program:
1. I have a BSW and graduated with a 3.68
2. I graduated from NYU's Advanced Standing Program with a 3.91
3. I have a lot of volunteer experience on my resume in conjunction with my field placements
4. I currently work as a therapist in community mentally health in NYC. And in my application I really highlighted the fact that I work in a fast-paced environment and have clients with an array of presenting problems. I felt like this would help ease some doubt that I didn't have enough experience.
5. Also, two of my recommenders were my professors from NYU. One of them graduated from NYU with his PHD and is currently teaching in the DSW program. And the other one, was apart of the first graduating class of NYU's DSW program. To me this was the strongest part of my application!