I don’t know how accurate or important this is, but it is fun. It is a common speed reading measure that takes the number of words read per minute with a comprehension gate (miss questions and it invalidates your session). Give it a try yourself
Source: Staples eReader Department
By the way, I was really slow, below the average 11th grader, the first time. Having a longer passage and larger font pushed me way up, though still not to college professor range. You can make those adjustments by clicking on the gear icon in the upper-right of the “book”.