Us west

Mining from California, I swapped to the US west server from the NAW server since running ping showed that the USW server gave me 20ms compared to 80-90 on the NAW. However, after swapping to USW, I noticed that my completion times are hitting 100ms per share compared to 80ms per share on the old NAW server. What gives? Should I just stick to the NAW server? I figured I’d get better times from a closer server…?