The Anglican looks at the "speed of liturgy" angle of this with some amusement. Now, I remember doing said eucharists at the chapel and UMCP with just the chaplain, myself, and whatever one or two other stray dogs wandered in. This took about thirty minutes and could be taken as a lower limit, but no Sunday liturgy could be that short unless nobody showed up. A more reasonable lower limit would be about an hour; a well-attended sung service is more likely to be in the 1 1/4 to 1/12 hour range.
Now, one thing that helps to pull Orthodox liturgies down into this range is that Orthodox priests just tend to talk a lot faster than Episcopal priests do. Even ex-Episcopal Orthodox priests talk faster than they used to. This helps to compensate for the wordiness of Orthodox liturgies. Even Rite I in the Episcopal Church is a lot shorter by syllable count than the Orthodox services. Part of the reason for this is unsurprising: almost all of the Western words are in the Eastern rite, plus all those litanies that were inserted in the East.