Can our auditory perception be used to trick our visual perception?
I don't buy it the claim made in the quote. The speed of sound is roughly 1 foot per millsecond so even if you take a large 3 foot step you are changing the audio visual onset asynchrony by only 3 ms. What this means is that if you present a flash and a click with various onset asynchrony to subjects you would expect there to be a narrow range of lags (less than 3 ms) over which they stop reporting that the flash occurred first. This study was run by van Eijk et al (2008): 

The relevant data are the temporal order judgements (TOJ) and it is clear that it is a smooth transition between thinking the flash was first and the click was first and not an abrupt step. Further, the transition takes around 200 ms or to get back to the original claim, about 100 steps. The 80 ms claim seems reasonable in that you do not consistently report the visual stimulus as occurring first more than 70% of the time until it occurs more than 80 ms before the sound.