Registrars see poll messages as soon as the TLD is allocated (typically by Monday 6pm Eastern).
Registrars can also check the Reports section at the Web Portal. In order to see a report for allocated domains after Sunrise Phase, check the report “daily-financial-transaction- ”.
Domains allocations are shown in this report under Action “SunriseMarkRegistration”
Regarding the applications, poll message are added to all the registrars accounts who have successfully created sunrise application.
To receive the poll message, use the standard EPP poll command. Attached is an example of the poll command.