I would secretly tut-tut those feeding o/n from 6 months - but after DD who had a feed more times than not until 14 months!!
Don't you just laugh at yourself for the secret tut-tut you used to do!!

I had a few secret tut-tuts that I now realise were completely unreasonable, as has been said, every child is different.

Katones, I hear ya, I would find it difficult to tolerate even well meaning advice from anyone let alone a first time mum if it had the whole 'you don't know anything' vibe attached. In that situation it would be a bit offensive.

I think there are some good opinions here too about taking the advice that works for you from the range of advice you get. Sometimes, it's all in the delivery!