Oddly enouh, while I was auditioning speakers I noticed that only one store I went into used bananna plugs on their display gear. I had one local place move speakers from the display/showroom to the listening room without a bananna plug anywhere. The one place that did use bananna plugs, the "sales engineer" had a little "tool" he "plugged" the banannas into between speaker changes. I'll asume it was a tensioner/spreader???
Just my observations.