Russell Wilson wasn't much more accomplished as passer than Prescott through 3 seasons. His teams had more success of course but that was obviously mostly due to the fact that they had an all-time, legendary type of defense for about a 4-5 year run.
If you look at Wilson and Prescott's stats over their first 3 years they're almost identical, and Wilson actually ran the ball significantly more than Prescott has, almost double in terms of attempts.
Wilson's 4th year is when he truly broke out as a passer, we'll see if Prescott can do the same.