You Got Six Months to Show Me Something

So, apparently...

America’s top intelligence official told lawmakers on Tuesday that Al Qaeda and its affiliates had made it a high priority to attempt a large-scale attack on American soil within the next six months.

Here's my question: If by August 3, 2010 Al Qaeda has made no apparent headway in launching a large-scale attack on American soil, what conclusions should we draw about AQ's organizational offensive capacity?