The problem with that correlation in this case, is that in all of the best examples of that phenomenon, the companies were no longer being run by their founders. I'd be willing to bet that's not a trivial factor in the overall situation.
And also regression to the mean (a constant factor in any of these attempts to predict the fall of a big company). When will a company want to, or need to, build a big headquarters? When things have been going very well and the sky seems like the limit.