This article compares the amount of money the Obama and Romney campaigns are raising. The writer rounded the numbers to the nearest million and sited their source, the Federal Election Commission, multiple times. In the electronic version of the article, links to the actual reports are provided.
The writer uses percentage to compare Mit Romney's fundraising to the entire Republican party's fundraising by saying, "accounting for about a third of the $106 million Republicans had boasted raising last month."
I do not think the numbers in the article are overwhelming. By calling attention to the percent difference and rounding the numbers, the writer makes the material easier for the reader to take in.