Scheduled reports now begin running (at 1 a.m.) in the local time zone you set for your AdWords account. In addition, for those using an MCC account, scheduled MCC reports begin running (at 5 a.m.) in the local time zone of your MCC account.
Please note that if you did not adjust your account's local time zone, your scheduled reports will continue to run just as they have in the past, in Pacific Time.