D.P.
I always looked at it this way (and I was home, no daycare either)...if he was still sleeping it was because he needed it.
If she doesn't "have" to be up in order to get somewhere, why would it be an issue?
I always used the philosophy "never wake a sleeping baby." The only exception was when his p.m. nap was too close to dinnertime. I never let him nap past 4 p.m.
Trust me, it doesn't last forever! My son is almost 8 and he's up with the chickens every day--even weekends now.