Will WiFi speed be faster if less devices get connected?

[bulingbu]

I can Add devices to blacklist easily when I enable a home WiFi hotspot with [paid software]. But will WiFi speed become faster if less devices get connected?

 

[Core]

No, unless all those devices are using up a lot of bandwidth simultaneously, for example if you have six iPhones downloading a 600 MB update at the same time, they will all download it slower. But simply having clients connected (and, say, browsing the web) does not measurably slower performance.