@breenzy @rik @Jvolby @JxckS No delay in ADSB data exchange website..
You can even prove this by having ADSBexchange and ATCLive sites open. Open up a busy airport like KATL and the audio and visual matches just about in milliseconds. Open up a tower or ground frequency for easy reference. When tower issues line up and wait instruction, the visual representation is right on queue with the ATC instructions.