I have provided the results for Patch 1.02 in the LtCol-Brig level.
LtCol-Brig v LtCol-Brig
1v1 Supremacy
Patch 1.02 (excludes Mirror)
Civ Games Win % Usage%
Iroquois 3968 2426 61.14% 15.40%
Spanish 4633 2648 57.16% 17.99%
Ottoman 3342 1716 51.35% 12.97%
Dutch 2885 1411 48.91% 11.20%
Sioux 2108 1021 48.43% 8.18%
French 3800 1679 44.18% 14.75%
Russian 703 295 41.96% 2.73%
Aztec 1404 568 40.46% 5.45%
Portuguese 1262 496 39.30% 4.90%
British 1133 433 38.22% 4.40%
German 520 186 35.77% 2.02%
Total 25758 12879
And here is how each civ did:
Aztec
Aztec v British: 36 - 25
Aztec v Dutch: 66 - 92
Aztec v French: 104 - 124
Aztec v Germany: 15 - 11
Aztec v Iroquois: 56 - 119
Aztec v Ottoman: 72 - 97
Aztec v Ports: 35 - 31
Aztec v Russia: 15 - 17
Aztec v Sioux: 59 - 83
Aztec v Spain: 110 - 187
Brits
Brits v Aztec: 25 - 36
Brits v Dutch: 39 - 71
Brits v French: 80 - 124
Brits v Germany: 11 - 15
Brits v Iroquois: 54 - 110
Brits v Ottoman: 50 - 121
Brits v Ports: 30 - 20
Brits v Russia: 13 - 14
Brits v Sioux: 49 - 53
Brits v Spain: 82 - 136
Dutch
Dutch v Aztec: 92 - 65
Dutch v Brits: 71 - 39
Dutch v French: 275 - 233
Dutch v Germany: 24 - 30
Dutch v Iroquois: 208 - 317
Dutch v Ottoman: 207 - 204
Dutch v Ports: 100 - 53
Dutch v Russia: 38 - 46
Dutch v Sioux: 121 - 118
Dutch v Spain: 275 - 368
French
French v Aztec: 124 - 104
French v Brits: 124 - 80
French v Dutch: 233 - 275
French v Germany: 59 - 48
French v Iroquois: 230 - 435
French v Ottoman: 242 - 324
French v Ports: 134 - 117
French v Russia: 49 - 48
French v Sioux: 153 - 195
French v Spain: 331 - 495
Germany
Germany v Aztec: 11 - 15
Germany v Brits: 15 - 11
Germany v Dutch: 30 - 24
Germany v French: 48 - 59
Germany v Iroquois: 17 - 59
Germany v Ottoman: 18 - 48
Germany v Ports: 6 - 20
Germany v Russia: 10 - 7
Germany v Sioux: 20 - 29
Germany v Spain: 11 - 62
Iroquois
Iroquois v Aztec: 169 - 56
Iroquois v Brits: 110 - 54
Iroquois v Dutch: 317 - 208
Iroquois v French: 435 - 230
Iroquois v Germany: 59 - 17
Iroquois v Ottoman: 372 - 266
Iroquois v Ports: 127 - 52
Iroquois v Russia: 99 - 35
Iroquois v Sioux: 228 - 164
Iroquois v Spain: 510 - 460
Ottoman
Ottoman v Aztec: 97 - 72
Ottoman v Brits: 121 - 50
Ottoman v Dutch: 204 - 207
Ottoman v French: 324 - 242
Ottoman v Germany: 48 - 18
Ottoman v Iroquois: 266 - 372
Ottoman v Ports: 99 - 68
Ottoman v Russia: 45 - 45
Ottoman v Sioux: 132 - 135
Ottoman v Spain: 380 - 417
Ports
Ports v Aztec: 31 - 35
Ports v Brits: 20 - 30
Ports v Dutch: 53 - 100
Ports v French: 117 - 134
Ports v Germany: 20 - 6
Ports v Iroquois: 52 - 127
Ports v Ottoman: 68 - 99
Ports v Russia: 11 - 17
Ports v Sioux: 37 - 46
Ports v Spain: 87 - 172
Russia
Russia v Aztec: 17 - 15
Russia v Brits: 14 - 13
Russia v Dutch: 46 - 38
Russia v French: 48 - 49
Russia v Germany: 7 - 10
Russia v Iroquois: 35 - 99
Russia v Ottoman: 45 - 45
Russia v Ports: 17 - 11
Russia v Sioux: 23 - 42
Russia v Spain: 43 - 86
Sioux
Sioux v Aztec: 83 - 59
Sioux v Brits: 53 - 49
Sioux v Dutch: 118 - 121
Sioux v French: 195 - 153
Sioux v Germany: 29 - 20
Sioux v Iroquois: 164 - 228
Sioux v Ottoman: 135 - 132
Sioux v Ports: 46 - 37
Sioux v Russia: 42 - 23
Sioux v Spain: 156 - 265
Spain
Spain v Aztec: 187 - 110
Spain v Brits: 136 - 82
Spain v Dutch: 368 - 275
Spain v French: 495 - 331
Spain v Germany: 62 - 11
Spain v Iroquois: 460 - 510
Spain v Ottoman: 417 - 380
Spain v Ports: 172 - 87
Spain v Russia: 86 - 43
Spain v Sioux: 265 - 156
Now there are few things to note between Patch 1.02 and 1.03 so far...
1) Where usage changed by 1% or more
Usage of Iroquois, Spain, Ottomans has dropped.
Usage of Dutch, French, Russia unchanged.
Usage of Sioux, Aztec, Ports, Brits, Germans has risen.
2) Where win % changed by 2% or more
Win % of Spain dropped.
Win % of Dutch, Iroquois unchanged.
Win % of Otto, Sioux, French, Russia, Ports, Brits, Germans has risen.
So 3 things "seem" clear.
1) Spain was weakened as desired by patch
2) Iroquois were not weakened by patch
3) Otto "nerf" wasn't - (sorry Otto fans