Weren't as strong as some of us thought.

I was surprised; so were market observers. From Bloomberg:

U.S. Economic Growth Slower Than Initially Estimated (Update2)

By Timothy R. Homan

Sept. 26 (Bloomberg) -- The U.S. economy expanded more slowly than previously estimated in the second quarter, showing consumer spending was weakening before the credit crisis intensified.

The annual rate of 2.8 percent was down from a preliminary estimate of 3.3 percent issued last month, the Commerce Department said today in Washington. Measures of inflation were higher than previously projected. Personal consumption, trade and business investment contributed less to gross domestic product than the prior estimate, the report showed.

Americans have since cut back on purchases, businesses have put investment plans on hold, builders have scaled back and credit markets have seized up. Economists at JPMorgan Chase & Co. and Morgan Stanley this week cut third-quarter GDP forecasts and Federal Reserve Chairman Ben S. Bernanke warned the economy may falter without a $700 billion bank rescue.

"Consumer spending doesn't bode well for overall growth over the next few quarters," said Russell Price, a senior economist at H&R Block Financial Advisors Inc. in Detroit. "It's pretty clear now that we are in a recession, and it's a recession that still has some room to run."

...

I was surprised -- not because I think the economy is strong -- but because revisions from the preliminary release to the final are on average 0, and have a standard deviation of 0.2 ppts. In other words, they're not typically too large.

Here's a picture of the revision.

I've included Deutsche Bank's forecast from 22 September; as indicated in the graph, this was a forecast predicated upon the 3.3% growth rate in 08Q2.