Interesting! It's good to hear he can compete with five silver dollars that are way bigger than him. They seriously are pigs, sometimes I get concerned about their health though; just the other day I saw my SD eat my GT's poop and didn't spit it out! LOL! I have to say that they aren't very bright, at least mine aren't. They scare easily and trap themselves as well... With that being said, I think they are the comedians of the tank.
I have a feeling Andy(cute name for a mean fish) will make quick work of the tetras when he gains a few more inches. He's probably not confident/comfortable yet about eating them.
How does your female TGT(true gt) behave during feeding time?