I got my first finger print
notice after i submitted my 485 one week later, now I finished my 4th fingerprint, I am still waiting for my i 485. However, my friend just got her first finger print on October 20th 2004. (she submitted her i 485 on June 5th 2003), her I 485 got approved yesterday. So I donot think fingerprint is earlier, your case will be proved earlier.
maybe you need second or third time fingerprint.