When was the first time in American history that this statement was true?

[Meursault]

"The Founders wouldn't recognize the country today."

One sees this claim, or some variant on it, made quite often, usually in the context of some arch-patriotic screed against the Sexual Revolution and its fallout.

But I'd suggest the social composition of the United States at the time of the Revolution was essentially gone by the 1820s. Jefferson was especially mortified by the prospect of General Jackson becoming President; he seemed to regard him similarly to how Lenin came to view Stalin - as a brutish thug.

Certainly the late feudal concept of dependence (described by Gordon Wood in The Radicalism of the American Revolution as "the ligaments that held this (colonial) society together"), or 'patronage', were dissipated in the crass commercial atmosphere of Jackson's America.

[courts]

1820s or 1830s at latest. i tend to agree with the leftist revisionist take on the revolution actually being a slaver revolt though
http://www.counterpunch.org/2011/05/23/was-the-american-revolution-fought-to-save-slavery/

[Meursault]

In some cases the Revolution certainly was a slaver revolt, but there was certainly a progressive element to it as well.

It usually makes more sense to speak of 'revolutions', particularly with national revolutions like the American without a dominant class interest.

[eric82oslo]

I guess in 1812, after the British burned down the White House.

Or forget that, as the White House clearly wasn't around at the time of the founding fathers anyways.