Here we go, it's gunna get messy.
As for sales numbers, EA COO Peter Moore announced that NPD figures show Titanfall sold 925,000 units at retail through the end of March. NPD figures only account for physical sales in the United States, so that doesn't represent worldwide sales figures, nor does it include any sales of the digital version. The Xbox 360 version didn't release until April 8, so its sales were also not included, but Moore described it as being "off to a great start as well".
~1 million and we're not counting digital sales, nor the 360 version, and I'm not sure if it includes bundles sales. Only US statistics.
Here's a rare occasion where we won't see anyone saying, "US is not the world." (<-- this amuses me greatly)
Thoughts? Not bad.