We've been turned away, and we've seen others turned away. At San Angel Inn, Le Cellier, Teppenyaki. We never eat late, so these all would have been turn aways between 5 and 6:20. Getting turned away twice in one vacation (and being given two hour waits with small children several other times on the same vacation) is what drove to me to the belief that I should make PSs.
Cancelling a PS is a nice thing to do, but if you don't cancel, it frees the table for the next random walk up. People do get turned away - but if you aren't there for your PS time, the next (or waiting) walkup of the proper size will be accomodated with your table. The table won't go to waste.
This isn't necessarily fair when you have a 5:10 PS and someone got turned away at 5:00 - only for the person appearing at 5:12 to get seated. But chances are the person turned away at 5:10 will never know the difference.
Cancelling a PS is a nice thing to do, but if you don't cancel, it frees the table for the next random walk up. People do get turned away - but if you aren't there for your PS time, the next (or waiting) walkup of the proper size will be accomodated with your table. The table won't go to waste.
This isn't necessarily fair when you have a 5:10 PS and someone got turned away at 5:00 - only for the person appearing at 5:12 to get seated. But chances are the person turned away at 5:10 will never know the difference.