Best answer by dlink7
I've seen < 30 ms just work fine on Nutanix(spikes). Some of the latency also may appear higher as secondary health checks happen on the cluster. It's really a depends answer because if an appliocation is using a larger block size, latency could go up, but throughput maybe be really good.
If you're having an issue contact support away. Also running the NCC(Nutanix Cluster Check) can give you some peice of mind.