Roughly quantified...
zg, the following is an excerpt from a post by chem nerd at BJMath.com, in which he presents his final analysis (for 6D) after a few threads of discussion.
I believe T-hop participated in these threads as well, and perhaps he will comment more on the subject.
-60 Hi-Lo Indices-
--------------------------------------------
Game: 6D, S17, 75% pen, Hi-Lo (indices from Wong's PBJ)
Betting scheme: 1 at TC<=1, 2 at TC 2, 4 at TC 3, 6 at TC 4, 2 hands of 6 at TC 5.
play dev_index_%gain_cum_rel
insurance 3 0.114 0.114 33.4
16 v. 10 0 0.041 0.155 45.3
15 v. 10 4 0.019 0.174 51.0
12 v. 4 0 0.018 0.192 56.3
12 v. 3 2 0.015 0.207 60.6
11 v. A 1 0.012 0.219 64.2
13 v. 2 0 0.012 0.231 67.7
10 v. 10 4 0.008 0.239 69.9
12 v. 5 -1 0.007 0.246 72.0
12 v. 2 3 0.007 0.253 74.0
16 v. A 8 0.006 0.259 75.8
10 v. A 4 0.006 0.264 77.4
9 v. 2 1 0.005 0.270 79.0
13 v. 3 -1 0.005 0.275 80.4
9 v. 3 0 0.004 0.278 81.5
soft 19 v. 6 1 0.004 0.282 82.6
16 v. 9 5 0.004 0.285 83.6
9 v. 7 3 0.003 0.289 84.6
15 v. A 10 0.003 0.292 85.5
8 v. 6 1 0.003 0.295 86.3
13 v. 4 -3 0.002 0.297 87.0
12 v. 6 0 0.002 0.300 87.7
10 v. 9 -1 0.002 0.302 88.4
soft 19 v. 5 1 0.002 0.304 89.0
8 v. 5 3 0.002 0.306 89.5
14 v. 2 -3 0.002 0.308 90.1
soft 20 v. 6 4 0.002 0.309 90.6
soft 13 v. 5 0 0.002 0.311 91.0
16 v. 8 7 0.001 0.312 91.4
6-6 v. 3 0 0.001 0.314 91.8
soft 19 v. 4 3 0.001 0.315 92.2
13 v. 5 -4 0.001 0.316 92.6
9 v. 4 -2 0.001 0.317 92.9
soft 18 v. 2 0 0.001 0.318 93.2
soft 20 v. 5 5 0.001 0.319 93.6
14 v. 3 -4 0.001 0.321 93.9
15 v. 9 8 0.001 0.322 94.2
soft 14 v. 5 -1 0.001 0.322 94.4
3-3 v. 4 0 0.001 0.323 94.7
11 v. 10 -4 0.001 0.324 95.0
15 v. 2 -5 0.001 0.325 95.2
soft 15 v. 4 0 0.001 0.326 95.4
6-6 v. 2 2 0.001 0.327 95.6
soft 13 v. 4 3 0.001 0.327 95.8
17 v. A -6 0.001 0.328 96.0
8 v. 4 5 0.001 0.329 96.2
14 v. 4 -6 0.001 0.329 96.4
16 v. 7 9 0.001 0.330 96.6
soft 14 v. 4 1 0.001 0.330 96.7
9 v. 5 -4 0.001 0.331 96.9
9-9 v. 2 0 0.000 0.331 97.0
soft 19 v. 3 5 0.000 0.332 97.2
soft 20 v. 4 6 0.000 0.332 97.3
15 v. 3 -6 0.000 0.333 97.5
9 v. 8 7 0.000 0.333 97.6
10 v. 8 -4 0.000 0.334 97.7
soft 17 v. 2 1 0.000 0.334 97.9
15 v. 8 10 0.000 0.335 98.0
14 v. 5 -7 0.000 0.335 98.1
soft 13 v. 6 -1 0.000 0.335 98.2