HADR wait on servers without HA configured
Why would the HADR_FILESTREAM_IOMGR_IOCOMPLETION wait occur at all?


According to Paul Randal's wait stats library entry for this, waits are to be expected whether AGs are configured or not:


  This wait occurs every 0.5 seconds for 0.5 seconds, regardless of whether any availability groups are configured.


Note however that this wait type was introduced in SQL Server 2012, so if your "live server" is an older version, you won't see this wait type on it.


  Since all three waits are running the same duration, is there any significance to the other two waits in this specific case, and could they indicate a slowdown situation on the server?


It's also not surprising that the wait duration is similar for these three waits, as they each occur on a routine schedule.


  Would this wait possibly cause, or indicate a cause of, a slowdown in a data load situation (5x-10x longer data loads than expected)


Unfortunately, these three specific waits are very unlikely to be the culprit for your slower-than-expected data load.  I would filter them out, and check wait stats again.  Consider filtering out all "benign" wait stats (example here: Wait statistics, or please tell me where it hurts) and reviewing what's high.