I'm sure many people are still running the 1000000 client.
And it's hilarious that crap like this even gets pushed out. This guy has no idea what he's doing in the code. He's just editing random variables and hoping they do what he wants.
You do realize it is >> right? higher >> means a lower number.
Perhaps I phrased that poorly. Or in a way that you did not understand. Anyway...
Allow me to rephrase it another way. By using an example. On bitcoin testnet, that variable in particular is decreased in order to reduce the minimum difficulty.
You, however, decided to increase it from it's starting value of 20, to an insane value of 1000000. You are in for some nasty difficulty spikes because of this.