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I have 2 Ubiquiti U6LR APs serving most of the house (and 2 more older AC-Pros serving the yard/outdoor patio and lower priority/IoT networks in the house). I frequently get complaints from my kids that "my phone doesn't work very well on the WiFi at my friend's house".

The older one finally asked me "do you think the WiFi is just super-good at our house?!"

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Ah, how great it would be to hear that from my children :)

There is hope, though, they recently started to speed test the networks they are in and mine is so far winning.

All this does not matter, really, as having 40 vs 200 Mbps on a phone did not matter much.

Speed doesn't matter, but packet loss and latency does.

People are surprised that I have the smallest fiber package (150Mb/150Mb and it's more than enough) and I have "better" internet than their gigabit cable.

How did you control latency?

As for packet loss, this would be a problem as it means hw issues or misconfiguration somewhere.

QoS and other queue management strategies can help significantly to prioritize latency-sensitive apps (by deprioritizing less sensitive traffic). fq_codel for Ubiquiti [and some others] or other "smart queue management" configuration.

Honestly, I was happier about his thought process leading to question the base case assumption than I was to the praise for our WiFi installation.

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