Did you read the thread I posted? It showed someone(causefx) posting 2Gbps/100Mbps service over DOCSIS/HFC. It was also confirmed by _Luke, who is a employee. Most 2Gbps service is fiber but it is available over HFC in some parts of AZ.
No, I didn't read the thread you posted. I guess we'd need to define "2 Gbps." Is it 2 Gb up and down or just a "hybrid" 2 Gb? I think the attraction to 2 Gb would be the upload but capping at 100 Mb seems like a scam.