My question is ProDataSet supported in OpenEdge 10.2B WebSpeed ?
Yes. I can't think of a reason why 10.2B should be slower. Do you modify any Progress-provided web code?
First, do as TheMadDBA says.
Second, assuming you confirm that your configurations are the same, profile both applications (10.1B and 10.2B) and see where you're spending your time in each.
Third, run your agents with -y and check your stats in client.mon; maybe there's a surprise there.
Fourth, if you're doing data access, it doesn't hurt to look at your CRUD stats to ensure they look the same in both versions.
Fifth, double-check what other workload exists on relevant parts of your infrastructure (webspeed transaction server, database server, web server, network segments). Maybe something external is skewing your test results.