Yes and no. For some comp sets that aren't as efficient on lower power, it'll start to make the midbass shine. Since you need more power to generate the motor force to get the woofer's driver moving, there's logic in that argument.
On the other hand, people seem to think that more power instantly equals a louder speaker and that's not necessarily true. You only get about a 3db rise in volume from a doubling of power, so realistically, there's no weight to the argument.
I should have also added that if I was going to power my comps at 150 watts, it would be to the woofers. Not a smart idea to give the tweeters that much juice, so that high power application would require an active setup. I've heard the midbasses really start to shine on more power, but I'm scared to see what that much would do to the tweets.