Puck JS - Triggering Beacon Using APDS-9960 Proximity Sensor

does that mean that for all the other Beacon companies out there that for ANY Beacon it can take 30 seconds or so to register a broadcast URL and be seen on the phone?

Pretty much, yes. The Bluetooth signals Puck.js makes can be the same as from any other BLE beacon, and have the same effect.

You'd have to read around it elsewhere and do some tests - it can be faster, but when I've been testing you can't really rely on it, especially it network coverage is a bit patchy.