We're successfully using DEP to enroll Macs in our JSS. This worked fine for months using Macs that come preinstalled with Yosemite.
Now, as we're receiving Macs that have El Capitan preinstalled, once they install the JSS MDM profile, it takes 20 minutes for them to start receiving their first policies / packages / config profiles.
Has anyone seen this with regards to Macs preinstalled with El Capitan?