Sounds like he's talking about Titanium Nitride (TiN) coated blades. They're a glossy yellow-gold color. I've not used them in utility knife blades but everything else I've ever tried that uses TiN coated cutting surfaces has been MUCH better than the uncoated versions. A TiN coated utility knife blade should cut through things with less drag and less getting stuck.
I'll have to hunt these things down at the hardware store and try them out.