Update virtual-machines-managed-disks-types-ga.md

Added HDD latencies

Author: siriusk-MSFT

includes/virtual-machines-managed-disks-types-ga.md

@@ -40,7 +40,7 @@ For standard SSDs, each I/O operation less than or equal to 256 KiB of throughpu
 
 ## Standard HDD
 
-Azure standard HDDs deliver reliable, low-cost disk support for VMs running latency-insensitive workloads. With standard storage, the data is stored on hard disk drives (HDDs). Latency, IOPS and Throughput of Standard HDD disks may vary more widely as compared to SSD-based disks. When working with VMs, you can use standard HDD disks for dev/test scenarios and less critical workloads. Standard HDDs are available in all Azure regions and can be used with all Azure VMs.
+Azure standard HDDs deliver reliable, low-cost disk support for VMs running latency-insensitive workloads. With standard storage, the data is stored on hard disk drives (HDDs). Latency, IOPS and Throughput of Standard HDD disks may vary more widely as compared to SSD-based disks. Average latencies for Standard HDD disks may vary between single-digit and double-digit milliseconds depending on the workload pattern. When working with VMs, you can use standard HDD disks for dev/test scenarios and less critical workloads. Standard HDDs are available in all Azure regions and can be used with all Azure VMs.
 
 ### Disk size
 [!INCLUDE [disk-storage-standard-hdd-sizes](disk-storage-standard-hdd-sizes.md)]