don't rely on internet hearsay/rumor as gospel nor those that sell and make more $ off of a competitors brand.
I'm sure Mark Williams Enterprises
http://www.markwilliams.com/ringpin.aspx would disagree with these "gear guys" you have spoken too as well as some prominent car builders and many, many class racers, bracket racers and heads up racers.
All I know for certain is that I've 60 footed a best of 1.17 with my 3124 lb. ride with Richmond Pro Gears purchased in 2009 that now have over 400 passes on them and when the time comes, they'll be replaced with the same Richmond Pro Gears.