I played all through the betas and am looking forward to Saturday with tons of anticipation. Your link doesn't appear to work at the moment (maybe server load, who knows) however I will say that throughout the betas the devs repeatedly stated that the performance was not optimized for GPUs yet and should be a lot better come release time. The only time I felt any stutter with my 560ti at 1920 was during massive WvWvW type scenarios. Everything else looked wonderful and played smoothly.
edit: The link wouldn't work over https, removing the SSL causes my work filter to kick in
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