Makes sense. If you used speaker cable that was much too small then you might want matched lengths. Then again, I think I would STILL want the shortest lengths possible -- at least that way the speaker on the shorter run would sound a bit *better* even if it didn't sound the same.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8