So, you're saying what exactly? That they're claiming to be on their third print run in order to stimulate sales, rather than as a result of sale?
Do keep in mind that Wizards is owned by Hasbro, a publicly traded corporation. Statements made by officials and releases are vetted in order to ensure that they are supported by data, otherwise it's a slippery slope into fraud.
I do know that 3e's initial print run was in the ballpark of 100,000 units. I do know that 3.5's initial print run was larger than 3e's, making it more than 100,000 units. I do know that 4e's initial print run was roughly 50% larger than 3.5's initial print run, making it more than 150,000 units.