That… Has nothing to do with what’s going on here.
They claimed their “wifi” was the “fastest” because had the highest “minimum guaranteed speed”. That speed is no where near 1Gbps. It guarantees 30Mbps.
This is not about having a 1-5gbps backbone, it’s about convincing people that basically the same wifi is faster than the competition, which is extremely misleading.
Even if their backbone is faster, that’s not even the argument they’re making. And even if it was, it’s not like people are likely to even notice that difference.