I switched 2 rigs over to VTC p2pool a few days ago and I have been getting very inconsistent results.
Specifically, I seem to get payouts frequently for a short period and then nothing after that.
The current run started last night. I got frequent payouts, every few minutes for small fractions of coins. Then, at around 9am this morning, all payouts stopped and have received nothing for 12 hours.
Meanwhile, the vertminer client continues to report shares being submitted.
In addition, on the pool side, it reports the "Time to share" as being between 12-15 minutes, bouncing around this value since 9am, but never going outside this range. The pool is reporting my hash rate close to what my client is reporting.
This happened on Friday as well, and im completely  at a loss to understand why this behavior is occurring.