Of course, but a sample size of one isn't very telling, statistically speaking.
There may be other factors that could cause that empirical value to change under different conditions, too. That might be a bigger problem if the operation becomes intermittent.
I am guessing it may be better to condition the signal externally than to rely on unpublished functionality. That, and to the best of my knowledge a Schmitt-Trigger only deals with level hysteresis, and that may not help with ringing of a signal.