Chad,
As negative numbers are not valid for Supervisor alerts, this is not currently possible. You might submit an enhancement request to add this functionality.
That being said, the pace (depending on numerous factors) can vary quite a bit, generating a lot of emails. The pace also isn't necessarily tied to successful dispositions, the connect rate, etc, so I'm not sure it's valid for your intended use anyhow. If you're wanting to monitor the connect rate, there's other stats that would show that.
Thanks,
Sean