Sambowie,
First off great screen name.
Secondly, asking a question then doing some reasearch and then setting a hypothesis and then testing it with more research and then coming up with a conclusion is the wrong way to do an experiment, I guess we need to rethink a lot of what we've done the past few centuries
My question back to you would be, how would you prove that direct sport competition affects game quality in a standard measurable way? To disprove the data given, you have to come up with a better source of data, and I am as of yet unaware of one.
Sure reviews are subjective, but so are your opinions which you think are right. Until you come up with harder numbers than the ones I have provided, you are simply the one speculating that the numbers are lying