Yes, these session statistic parameters do work with WebSpeed and AppServers. These parameters collect statistics about client session activity and performance.
Collect procedure access and usage statistics.
Segment Statistics (-yd)
Write segment statistics to the client monitor file (client.mon by default).
Statistics with Cross-reference (-yx)
Collect procedure call statistics and write them to an output file (proc.mon by default).
Statistics with CTRL-C ( -yc)
Substitute CTRL-C for executing the SHOW-STATS statement.
For more information on how they can be used, refer to
Solution P14930, "How to troubleshoot WebSpeed agents utilizing high amount of CPU"