Actually I only get about 6, before I hit monarchy. I've traded for a few of those "starter" techs.
Yeah the strategy only works if you know you have foot access to large number of huts, and of course if you can avoid 1 move tiles. Moving scouts to uncover a large map area is necessary, if you waste time wading through jungles or forests, or if you don't work in two moves on hills and mountains, you lose a lot of precious time. I use the conscripts to wade through those areas, if possible.
On a huge pangenea, map making is nearly irrelevant to travel. Occasionally you'll get a big split, but ussually I only get 1 main land and very few islands.
Oh and I must confess, after thinking about it, I was a bit on 75%, it is probably more like 30-40%.
This strategy is a waste of time, unless you can use your immediate units (scout, Jaquar Warrior, et al) to scout and move at a pace of two. It works rarely on continents, and is a waste on archepeglia(sp?)
edit:
A footnote. I like playing with as many civs as possible, so on a standard huge, I would play 16. A month into PTW I modified the bix file to Huge: 180x180; 24 civs; 420 tech advance; 30 spaces between civs. Tech advance maybe should be upped a tad. The tatic was developed with the standard Huge world, though.
oh and it can help the Americans get that GA, near the discovery of Astronomy (Cornicopious,exp). It gives you a jump on the Hanging Gardens(ind); of course remember Im talking from a Regeant/Monarchy level, so it might not help that.