My data point:
I'm working from home. My computer is connected through company VPN, over wifi to Comcast.
Comcast speed test says 18mS.
I use VNC and Webex with voice and video through the computer.
VNC response time and voice delay is not noticeable.
The only informal paper I remember is Stuart Cheshire’s It’s the latency, stupid…
Given it’s from the dialup days, but latency is still the same just a lot lower.
I would thing I would recommend now is checking out SRE docs as well for application latency it’s not network related, but does affect performance.