I have excluded all mirror matches from these results.

CGO v CGO

1v1 Supremacy Patch 1.02 (excludes Mirror)
Civ         Games    Win    %
Iroquois    10195    6032  59.17%
Ottoman     11961    6795  56.81%
Spanish     8401     4558  54.26%
Dutch       10652    5480  51.45%
Russian     5574     2834  50.84%
Sioux       8826     4336  49.13%
Aztec       8836     4154  47.01%
French      10193    4518  44.32%
German      2761     1125  40.75%
Portuguese  3365     1373  40.80%
British     6176     2265  36.67%
Total       86940    43470

FGO v FGO

1v1 Supremacy Patch 1.02 (excludes Mirror)
Civ         Games    Win    %
Iroquois    6397     3724  58.21%
Spanish     6330     3570  56.40%
Ottoman     5830     3208  55.03%
Dutch       5035     2528  50.21%
Sioux       3558     1742  48.96%
French      5674     2607  45.95%
Russian     1578     687   43.54%
Aztec       3283     1348  41.06%
Portuguese  2113     828   39.19%
German      972      370   38.07%
British     1828     687   37.58%
Total       42598    21299

GO v GO

1v1 Supremacy Patch 1.02 (excludes Mirror)
Civ         Games  Win   %
Spanish     979    583  59.55%
Iroquois    644    364  56.52%
Ottoman     341    173  50.73%
French      842    388  46.08%
British     235    106  45.11%
Dutch       343    152  44.31%
Portuguese  348    154  44.25%
Sioux       253    106  41.90%
Aztec       150    53   35.33%
  -----------------------
Russian     64     26   40.63%
German      33     11   33.33%
  -----------------------
Total       4232   2116

It will be interesting to see how Patch 1.03 shakes out compared to Patch 1.02.