Air temp and air density (i.e. Launch elevation, among other thing) affect the true air speed (TAS) of the drone. Add wind velocity vector to the TAS to get your ground speed, which is what your readout is is likely giving you on your device. Therefore, it is entirely possible everyone can have a different "top speed" based on atmospheric conditions and launch location. Around sea level on a calm day (no idea what the wind was, likely less than 5 mph) I got 30 mph. You'll get a higher TAS (relative to indicated airspeed on real aircraft; the drone doesn't have an IAS indicator) and ground speed at higher elevations because there is less air putting drag on the aircraft. This is everyone is flying standard, out of the box. Don't forget to reduce speed for prop guards (more drag), different skins (more or less drags), other mods, more efficient props, etc.
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