The 'speed' of my tactic is heavily dependent on food available for growth. A single 4F tile is definitely not the best. With an irrigated Corn or on floodplains it would work better, of course.
With a single 3F tile for growth the conventional 'get BW, then chop-chop-chop' tactic would work better. You'd just get the second city where you can whip faster.
I do agree that sometimes it makes more sense to rush the Settler first, then Granary. The rest is essentially the same - get Pottery for cottages and Granaries and let the city grow over cottages, then BW for whipping and chopping. Build cottages first, then chop/whip.
The difference between 1) stagnate the city at size 2 for a Settler, and 2) let it grow until 4, then stagnate for Settler, then whip, should be obvious. Even without Granary you basically convert the same food to hammers for Settler in both cases, only in the second one you work more profitable tiles most of the time. Like a double benefit from the same food - you use it first for growth, then for hammers.
Having Granary makes this benefit unbeatable.
With a single 3F tile for growth the conventional 'get BW, then chop-chop-chop' tactic would work better. You'd just get the second city where you can whip faster.
I do agree that sometimes it makes more sense to rush the Settler first, then Granary. The rest is essentially the same - get Pottery for cottages and Granaries and let the city grow over cottages, then BW for whipping and chopping. Build cottages first, then chop/whip.
The difference between 1) stagnate the city at size 2 for a Settler, and 2) let it grow until 4, then stagnate for Settler, then whip, should be obvious. Even without Granary you basically convert the same food to hammers for Settler in both cases, only in the second one you work more profitable tiles most of the time. Like a double benefit from the same food - you use it first for growth, then for hammers.
Having Granary makes this benefit unbeatable.