The CDW MediaRequestEmulator service has a default delay of 1min and a default polling interval of 1min. You can try adjusting these.
SourceAETitles: "AE titles of Storage SCUs for which Media Creation
Requests shall be emulated. Multiple AE titles are separated by new
line. For each AE title, a minimum delay time between the time the last
object of a patient is received and the emulation of the Media
Creation Request for all objects belonging to the patient can be
explicit specified. If no delay is specified, a default delay of 1
minute is used."
Example: DCMSND:2m - sets a 2 minute delay for studies received from DCMSND