Yet there are Nexuses, like mine, that have no issues whatsoever. (Granted it's the third one I've tried, but still.) Your chart can't account for that. Logically, about the only explanation that can is that some or even many early devices were affected by bad/faulty hardware. Attempting to quantify that is obviously going to be very difficult.
So to broadly state "PSA Serious Flaw in the Verizon Galaxy Nexus" is a little bit of a blanket statement.
Serious flaws in some of them? Sure, no question. I saw it, and many others have as well.
Serious flaw in all of them? That's not accurate either.
Hard numbers? Frustrated owners have been posting screen shots of their signal readings along with those of others devices for months now. Yours is very nicely done, but with all due respect I don't think it's the definitive statement that's going to wake Verizon up and do something about it.