They may not have heard of Gnutella, the network, but they may be familiar with some of the software that supports it: LimeWire, Shareaza, BearShare, WireShare, FrostWire, iMesh, and probably others I'm forgetting.
LimeWire I’m familiar with and one they’ve definitely used but that seems like a thing from 20 years ago. And by the 2010s I don’t know if anyone still used it. Given that, now I’m curious on why it was mentioned to be better than TBP which survived while Limewire (not sure about the others but have never heard of them) didn’t.