I'm not sure you can be comparing bars. The nexus only uses 3 and the OG Droid uses 4. So unless you have 1 bar on the Gnex and 4 on the OG, you can't tell if you have an issue.
With that said, my signal does seem a little weaker than my OG and I did have an instance where I had no data, but it was showing 2 bars of 4g. I had to toggle airplane mode to get data to work.
I'm already rooted, so I will wait for the devs to fix this. If it turns out to be a hardware problem that can't be fixed, than I'll trade it in for a new 1. It does have a 1 year warranty so no reason to rush to VZW to give them back the phone, unless you find it unbearable of course.
Sent from my Galaxy Nexus using DroidForums