I found my eyes 'jumping' from word to word. I didn't miss any, and I went to the correct lines, but I did seem to be reading at a much slower clip. But that's from spending 30 seconds reading the webpage, so not very scientific.
"Jumping from word to word" is a pretty slow way to read - "speed reading" involves chunking blocks of words or even entire lines - if you watch some people when speed reading their eyes don't scan left-right at all, but just stop briefly on each line as they scan down the page.
I felt (without experimenting in a measurable way) that particularly the blue-red transitions _really_ slowed down my "normal" reading…
