Historically it is very seldom. We obviously will need more time to see if this 2/6 is a pattern or an aberration.

This was just limiting it to this century, though. The pattern is well established and well understood. It isn't even very complicated. Each state has 2 senators and at least one representative. The number of electoral votes of a state is the number of senators plus the number of representatives. So a state like mine, Vermont, has three electoral votes even though we have only about 500,000 citizens. If population size were uncorrelated with political leanings, this would just contribute noise to the electoral process, but it doesn't. Less densely populated regions are conservative. The more such regions there are in a state, the lower the population of the state. So in effect conservative voices are given extra weight in elections. If you believe in the principles of the Declaration of Independence -- "all men are created equal" and whatnot --, this should offend you.