Service Bus Metrics Delayed

I've been using the Metrics REST API documented at https://msdn.microsoft.com/en-au/library/azure/dn163589.aspx to get metrics for Service Bus Queues. I've noticed that there seems to be a 10-15 minute delay to get the latest data. Is it possible to get near real-time information about the service bus queues? We have a high-priority queue that expires messages after a couple of minutes. We'd like a way to poll every minute to see if the deadletter queue is growing.