Originally Posted by jfowler85

I didn't ask for a study, I asked for a substantiation. You answered with opinion.

I will not pretend to analyze the market forces which motivated your cottage industry - you are more then welcome to school me though. My area of expertise is medical biology, perhaps yours is economics.

I'm unclear why this is so upsetting to you; it's your opinion that internal BBs last longer than external. That's great, but it's an opinion, and your opinion is not a rationally verifiable claim for anyone on this forum. If it was then we could figure the statistics and determine the logical answer, but this is not the case.

Again, I agree with most of what you are saying; let's call a spade a spade here. Ie, an opinion is an opinion.