yep, that be the one.
Not to worry as people with the very latest hardware/software are also getting that same message ... this last client update was a major one and as such the hardware/software detection built-in is "upsetting" a lot of people.
I don't think there is anyone with a nVidia card
not receiving the same message.
The really annoying thing is, we can't easily contact ANet as their "GW2 forums" are NOT live. That really bugs me.
Not long to go till game goes live ...
[EDIT]
...actually, my message does specifically state my graphics card is below par, as I have seen many other complaining of such, I did some research and found out the pending remedy.
I still don't think you will have any more troubles than anyone else with your same specs ... we shall see.