We have the same strange feature and still ignore the values.
Our NT-servers are connected to ADSM (OS390 3.1.2.20). Each server has its
own TR16 segment and when believing ADSM's output we get a network data
transfer rate of up to 500 MB/s (4 Gigabit/s). Not bad! Only a bit
disappointing that we only get 95 KB/s aggregate data transfer rate:

10/22/1999 22:02:50 Total number of objects inspected:    7,303
10/22/1999 22:02:50 Total number of objects backed up:       83
10/22/1999 22:02:50 Total number of objects updated:          0
10/22/1999 22:02:50 Total number of objects rebound:          0
10/22/1999 22:02:50 Total number of objects deleted:         10
10/22/1999 22:02:50 Total number of objects failed:           0
10/22/1999 22:02:50 Total number of bytes transferred:     7.29 MB
10/22/1999 22:02:50 Data transfer time:                    0.01 sec
10/22/1999 22:02:50 Network data transfer rate:        497,840.62 KB/sec
10/22/1999 22:02:50 Aggregate data transfer rate:         94.22 KB/sec
10/22/1999 22:02:50 Objects compressed by:                   69%
10/22/1999 22:02:50 Elapsed processing time:           00:01:19

As those wrong values don't occur with WAN connections it could be a problem
with ADSM and Token Ring. It is definitly not depending on the ADSM version
(client and server OS/390), we got the same fantasy values for years through
all versions.

Regards,
Michael