At least in Germany it's worse but generally fine, you can achieve <20ms ping for online gaming within or near Germany. Fiber is for sure better through but probably won't make a difference in day2day.

I just checked at home, and the latency I get on my Cable connection is about 70 ms on average!

If Starling does indeed provide even a lower bandwidth connection at just 20ms, that is a nett win. Cool!

I don't know if a fiber to home would achieve lower latencies than 20 ms.... Someone mentioned DOCSIS - don't know much about it. Is that not needed for a fiber connection?

When not congested, I used to get about 4 ms to servers in my city.

But on one provider, with congestion, that would go up to 15 seconds (yes, 15.000 ms) basically every evening during the pandemic…

It all depends on how well a network is managed. This is true for ever access technology; fiber just has a lot more headroom to mask bad network management, congestion etc.