I had a 160 in VR, have had two publications one of which I am first author, a 115 page Master's thesis, a couple of kickass personal statements, and a 3 on my AW. I took the GRE twice and got a 160 in VR twice but I got a 4 in the first GRE. I wasn't particularly happy with the 4 but it demonstrates the subjective nature of the AW section of the GRE.
Only one of the five schools to which I applied even mentions the AW part of the GRE. If everything else is good, no sweating this out,
I'm talking to myself almost as much as I am talking to you.