The irony is....
"Cisco took exception to the new label"
I'm sure they did, as it's Brocade nicking the Cisco naming convention for the generations of supervisor cards in their 9K series FC switches.
For a few years now Cisco have called their switch bits Gen 1, gen 2, gen 3 etc. Each Gen tends to follow a speed uplift, so Gen 1 was 2Gbps, Gen 2 was 4 Gbps At the way they have been going, it would be reasonable to expect their "gen 5" series cards to be 16 or 32 Gbps