I don't see it as being "turned on" or "turned off". At some point in the midst of blowing a double digit lead, your starters are going to be on the floor and asked/expected to dig deep and get a stop or two and make a few buckets to kill the run. Our starters have been repeatedly unable to do that, which suggests that we're going to be vulnerable to big runs for the foreseeable future.
One analysis that would be interesting would be to see if Doc has a quick hook on the reserves at the start of these runs or if Doc's penchant for starting the reserves at the beginning of the 4th is causing them to blow 6-10 points and then the starters come in and take a while to get going and the rest falls from there. Anecdotally, I don't feel like this is the case, but there could be some combination of substitution patterns that would result in this not being as bad as it seems, because to me it certainly seems very bad.