"at which point, I said something along the lines of "I don't really agree with your thoughts on that""

If your goal was to stand by your understanding then you certainly succeeded. However, if your goal was to get the job then you might have left a better impression by instead saying "Well I am always open to learning more correct ways of getting the job done." I am all for honesty but during the interview I am certainly aiming to please. If I disagree then I will reflect that by not accepting the offer. ;)

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)