I would imagine that's exactly what is going down. As noted above, these types of cases are such a high volume time suck in our county (and muni) courtrooms. Again, it doesn't excuse the behavior, I'm just raising awareness I guess to how commonplace this is in society.
It does bring some memories from days in the DA's office. I'm serious when I tell you this, if the facts of the case did not involve alcohol, children in the car, property damage or injuries, our standing instructions were to amend/plead these cases down to non-criminal offenses and get them out of the system ASAP.