On this particular map the maximum (Y-value) for pop is 1054 and for land it is 1133. Y-values for Tech and Wonders are 334 and 310, as always in unmodded BTS.
The actual scores you get for pop, landtiles and techs are:
Population 1 2 3
Score 4 9 14
Landtiles 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Score 3 5 7 8 10 12 14 15 17 19 21 22 24 26 28 30 31 33 35 37
Techs 4 5 6 7
Score 23 29 35 41
(I'm assuming only ancient techs so far)
With a palace and no other wonders, everyone will have 16 points from Wonders at this stage of the game.
On T23, when we meet Shaka, he has only 65 points. The land tiles in his outer ring doesn't count yet, because he hasn't owned them 20 turns. The score for them comes in on T24. Reduce 16 points for palace and we know his total score for pop land and techs is 49. His pop must be between 1 and 3 (known from demographics and victory screen) and he must have between 2 and 9 land tiles.
The possible combinations to make 49 points are:
35-4-10 (6 techs, 1 pop, 6 land)
35-9-5 (6 techs, 2 pop, 3 land)
23-14-12 (4 techs, 3 pop, 7 land)
23-9-15 (4 techs, 2 pop, 9 land)
On T24 his score went up to 81. This increase includes the added land from 2nd ring, but can also include growth or a researched tech. In demos we can see that minimum population goes up to 2, so his pop must be either 2 or 3. Victory screen shows his land owned as 1%, which means he owns a minimum of 12 land tiles and his land must between 12 and 21.
Reducing 16 points for palace, his land, pop and tech now must add up to 65. The possible combinations that could be follow ups to his T23 score are:
T23:
35-4-10 (6 techs, 1 pop, 6 land)
-> T24:
35-9-21 (6 techs, 2 pop, 12 land)
T23:
35-9-5 (6 techs, 2 pop, 3 land)
-> T24:
35-9-21 (6 techs, 2 pop, 12 land)
T23:
23-14-12 (4 techs, 3 pop, 7 land)
-> T24:
23-14-28 (4 techs, 3 pop, 16 land)
29-14-22 (5 techs, 3 pop, 13 land)
T23:
23-9-15 (4 techs, 2 pop, 9 land)
-> T24:
23-9-33 (4 techs, 2 pop, 19 land)
23-14-28 (4 techs, 3 pop, 16 land)
Normally on immortal Shaka would start with 3 techs, so I find it highly unlikely that he has only 4 techs by T23. This means that unless he has been crippled by the game designer,
on T24 he has 6 ancient techs, his capital is size 2 and he has 12 land tiles in his BFC. Inner ring has either 3 or 6 land tiles. The low pop would be explained by the fact that he has built a settler, he settles T25.
If he teched his 5th tech on T24 (this means he must have gone for BW, though I still think he would have got it earlier), he could have size 3 capital, 7 land tiles in inner ring and 13 land tiles in BFC.
When he settles 2nd city on T25 his score goes up to 86, because of one added population point. No more additions to score during my set until T28, which makes those 4 tech alternatives even more unlikely. If he has only 4 techs still by T28, then he most likely started with mining and went straight for BW->IW, which means we are in trouble...
If Chris can tell how his score has developed turn by turn, I might be able to figure out more, like if he indeed has been researching IW as 2nd tech.
Nice teamwork, too... ecawilson, your comments are very useful, keep it up! And et & Zhary, nice input. 
I guess I'm the only one who didn't contribute much to the set.
