The Los Angeles Times reports that the U.S. Census Bureau, in their initial reports, vastly overestimated the number of same-sex households in the United States:

The 2010 census overestimated the number of households with same-sex married couples by more than 160%, the U.S. Census Bureau announced Tuesday.

The 2010 census first reported that there were 349,377 same-sex married-couple households and 552,620 same-sex unmarried-partner households across the country.

On Tuesday officials said they had revised the count to 131,729 same-sex married-couple[s] and 514,735 same-sex unmarried-partner households.

In other words, the actual number of same-sex households in America is tiny - only 0.773%.

Of course, these revised national numbers also change the landscape on the state level.

In Minnesota for instance, the StarTribune reports:

The original census data counted 4,325 same-sex couples who identified themselves as married and living together in Minnesota -- three times higher than the revised figure [~1,300]. The original census data also counted 13,718 same-sex couples living together in Minnesota, regardless of marital status, while the revised estimate is now only 10,207.

And in New Jersey, the Star-Ledger reports:

"...the U.S. Census Bureau said a statistical snafu inflated earlier totals, and there are actually fewer gay and lesbian couples living together in the Garden State than previously estimated.

The Census now says there were 16,875 same-sex couples living together in 2010, down from original estimate of 24,112 released two months ago. Notably, the new figures drop the number of married same-sex couples living together in New Jersey to 4,447 down from nearly 11,000."

Or, take a look at California, via the Sacramento Bee:

In California, the Census Bureau said, 0.726 percent of households are same-sex couples, markedly lower than the 2000 census figure for the state.

Again, less than one percent.