That's a generic statement if I ever heard one. I guess that thread is somehow proof to never put a 1.7 rocker on a sbc..
I remember one time I lent a friend a set of higher ratio rockers to try on an engine he was dynoing for a customer. The customer was going to make a decision of buying them (his own higher ratio rockers) from the results. The customer decided not to buy them after seeing the results, he thought they weren't worth enough power to justify buying them....they made 8-10 average more hp in the range the engine was to be operated in.
I remember thinking...What did you think they would make 50 horsepower more?
I've seen ratio changes do nothing on the dyno, I've seen gains like I just mentioned, and I've seen gains of more than that. "Worth the expense" is completely relative to a lot of different things.