Portal with RTX just came out today, so I played it a little. No commentary if that's what you wanted. I thought the drop in performance was very noticeable (RTX 2080, i7-8700k, 32gb 3200MHz RAM). Very laggy, and the improvement in texture and reflection quality was cool, but not as good as I thought it would have been.
I did bind jump to scrollwheel just because it's fun. I don't speedrun or anything (as you can probably tell).
And yes the text in the thumbnail is blurry on purpose