This is an interesting discussion - it hasn't adversely impacted my commitment. If anything, it's strengthened it.
That said, even though I try not to let it negatively impact me, I know it is distracting. In fact, we have to plan out how we would alter our outreach directed to external audiences should a shutdown occur...this is time that would otherwise be spent on our regular workload. With no government shutdown, that was just wasted time.
Surely other agencies are doing the same thing. I've seen many stories about how much a shutdown would cost once it happens...but I bet it costs even more when you add in the amount of time gov't employees are spending preparing for it - not to mention having to ramp up when we return.