the concurrency setting you are referencing has to do with events, not connections. The Deployment Server communicates via the management port. What you will read in the doc above, is that a Deployment Server managing over 300 forwarders should be it's own instance and not activated on a search head that is busy doing other things... but you can read about it in detail on the Wiki.
With Splunk... the answer is always "YES!". It just might require more regex than you're prepared for!