I ran a few twodimes simulations to see how high hands do in 3-handed pots. I tried to make the simulations such that this is a 10-handed table, from which 3 people are in the hand. So the low hands I'm including are quite good.
http://twodimes.net/h/?z=1432136
pokenum -mc 500000 -o8 qd ks tc jh - as 2s 6h 9d - 2h 3s 4d ac
Omaha Hi/Low 8-or-better: 500000 sampled boards
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Ks Tc Qd Jh 143687 245453 254547 0 0 0 0 0.389
As 2s 9d 6h 38151 148098 346609 5293 9233 112887 150558 0.272
3s Ac 4d 2h 59141 101156 393551 5293 147146 4696 150558 0.339
http://twodimes.net/h/?z=1432139
pokenum -mc 500000 -o8 qd ks tc jh - as 2s 6h 9d - 2h 3s 4d 5c
Omaha Hi/Low 8-or-better: 500000 sampled boards
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Ks Tc Qd Jh 135772 224984 275016 0 0 0 0 0.361
As 2s 9d 6h 76666 137584 361011 1405 137778 124053 1960 0.314
3s 5c 4d 2h 76654 136027 362568 1405 171467 127878 1960 0.325
http://twodimes.net/h/?z=1432141
pokenum -mc 500000 -o8 qd ks tc jh - as 2s 6h 9d - ah 3s 4d 8h
Omaha Hi/Low 8-or-better: 500000 sampled boards
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Ks Tc Qd Jh 125096 213481 286519 0 0 0 0 0.339
As 2s 9d 6h 95421 146513 353302 185 163292 96163 4302 0.349
3s 4d Ah 8h 83405 139821 359994 185 143979 153534 4302 0.312
http://twodimes.net/h/?z=1432143
pokenum -mc 500000 -o8 qd ks tc jh - as 2s 6c 9d - ad 3d 4h 8h
Omaha Hi/Low 8-or-better: 500000 sampled boards
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Ks Tc Qd Jh 116561 192047 307953 0 0 0 0 0.309
As 2s 6c 9d 95878 143705 356123 172 163630 96003 4315 0.348
Ad 3d 8h 4h 100224 164076 335752 172 143897 153856 4315 0.344
http://twodimes.net/h/?z=1432146
pokenum -mc 500000 -o8 kd ks qc ah - as 2s 6c 9d - ad 3d 4h 8h
Omaha Hi/Low 8-or-better: 500000 sampled boards
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Ks Qc Kd Ah 131736 206548 293452 0 0 0 0 0.338
As 2s 6c 9d 95349 136766 363053 181 157764 89026 4253 0.337
Ad 3d 8h 4h 95853 156505 343314 181 125369 150923 4253 0.324
KQJTr is definitely one of the lesser high hands, and it seems to do well against almost all but the very best strictly low hands (e.g. A348ds). A much better high hand, KKAQr fares better than average even against the better low hands.
If, however, there are two high hands and one low hand in the pot, the low hand is by far the favourite.
http://twodimes.net/h/?z=1432152
pokenum -mc 500000 -o8 kd kc qs ah - as 2h 6c 9d - ad qc jh ts
Omaha Hi/Low 8-or-better: 500000 sampled boards
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Qs Kc Kd Ah 81574 215882 267106 17012 0 0 0 0.311
As 6c 9d 2h 136701 136701 363299 0 315338 0 0 0.478
Ts Qc Ad Jh 66026 130405 352583 17012 0 0 0 0.210