One time abouna had to leave very early to fly to California for a wedding, so the liturgy was two hours (it's usually about 3.5), 7:30 AM to 10 AM. Usually it's 8:30 to about noon. It was really weird to have the agape meal at 10 in the morning. It was quite a while ago, but I can't imagine that anything was skipped. Probably just the short forms of the prayers were used, maybe without the extended, heavily meslimatic introductory bits of the chants, etc.