Again, the numbers need to be run. There's no way to tell without them, the truth could be either way.
If "you" is some abstract entity with infinite time, perhaps. Even if you do ten three-hour runs a day, you can't actually get a very high deviation from average in any given century. Getting a certain deviation requires exponential time in proportion to the number of RNG calls.
And you can see from the numbers that it's not just Mitchell's values that deviate from the expected mean, it's the others as well (he's just more extreme), which also shows we can't expect them all to converge to the mean, there's some more complex statistical process going on.
His deviations being more extreme might be explained by him playing more games, or it might be cheating. So far we can't tell.