I can confirm. On one taming char I have 110/110 and it consumes 8 mana per second, and on another char I have 120/120 and it consumes 6 mana per second. Both have LMC 40% suits, but one is elven and the other is human,. For the 120/120 I have chained Balrons without healing but have healed with Paragon Balron. But I did not wait and see if health stabilized at a lower level, it was just an abundance of caution. For the 110/110 character mana drain is still an issue with 40 LMC, 12 Regen and GM meditation. So that extra 2 mana/sec makes huge difference.