The Trolls ate 1 1/2 Villages?

[Valandil]

Part of the quote is also, "... since we came down from the mountains"

This begs the question - how long had it BEEN since they came down from the mountains? Did they just come down for a few weeks? For a season? Or maybe... a few years?

Eleven years before this - Aragorn's grandfather, Arador - was 'taken (and killed) by trolls' in this general vicinity. Although they're played up for a children's tale in this account - could the culprits in the Arador case have been William, Bert and Tom?

Of course - the statement is, I think, primarily one of hyperbole and chiding over gluttony. One wouldn't think that trolls would consider it a bad trait, but perhaps we misjudge them.