You should say "In JIRA your performance could be measured"... We use JIRA and we find it extremely useful, although we never use real-time values for estimate

You should say "In JIRA your performance could be measured"... We use JIRA and we find it extremely useful, although we never use real-time values for estimates or reporting. Story points, which I believe are recommended by the Agile framework, are used to estimate and draw burn down charts and reports. We can then use these to adjust our estimates for future sprints. JIRA really is a tool and just because some managers use it poorly, doesn't mean that is why it was created. Those managers would be bad regardless of the tool.