well, to be honest de-localising and de-personalising the SERPs remains a real challenge to me. it is obvious what you are meant to do but actually when I have tried it across proxies it never seemed to work the way I might like. personally, I think that it is almost impossible to get a 'uninfluenced' set of SERPS because google believes and relies on personalisation and localisation, but that is just an unfounded opinion . Which brings me back to the my earlier point about conducting experiments like this by oneself is the only valid way of doing it because other people's actions always muddy the waters.
I mean, you are seeing exactly the opposite to Rod. I see results more like you are with the dynamic style URIs not showing so well. Lankey see's his pages still there which to me argues on how strong personalisation actually is.
I am trying really hard not to say that the fact that you all can't agree on the 'observations', let alone any interpretation of those facts, kind of supports my earlier point that this is all a bit flawed. I am trying to find a way not to be entirely negative but it is kind of hard.
I think that a reasonable point that perhaps is all that comes out of all of this is that:
'Keywords in the URL seem to have less effect, either positive or negative, than many of the other factors in play.'
Which actually most of us agreed with from the start...