We can read the same words and take something different from them. That reads to me like he was able to pretty easily dismiss the temptation. Maybe he would've been tempted like Boromir was, maybe he would've had the resolve of Frodo, maybe he could've held it for much longer like Bilbo.
His Hobbit-sense saved him there. The only one who can tell us with certainly where it lies in relation to Frodo is no longer able to.
Interesting choice given the way that's been shifting slowly back to the more accurate form in the past however many years.
If colloquial usage did trump all, irregardless would've been acknowledged as a correct word well before I was born. It may be the driving force but it's hardly the only, or even constantly deciding, factor