For some stock holders it may cost them money. Moving an extra quarter of dividends into this year may put them in a higher tax bracket.
Dividends aren't ordinary income, dividends have their own tax rate and aren't progressively putting one in higher brackets. Currently they are taxed at 15%, next year it will be 20%
That's how Romney can make millions and pay a 15% rate, instead of the higher rate that "earned" income takes, most of his income is derived from dividends.