You think so amuffin? What does that typically mean "very little power phases"?
Think of it this way:
Power phases are like highway lanes, the less you have, the more chance cars can get jammed in them. The cars can get jammed like traffic, because there aren't enough lanes for those cars to get to. In this case, car=clean power to the CPU, the more lanes you have the more cars you can carry, resulting in more clean power to the CPU!
More power phases=better stability, better overclocks, lower voltages, etc. etc.