Can I ask who gave you that advice? I was told to stay with my regular size, as they'd stretch. I was comparing them to the 15 oz. deep indigos. Went true to size, and they were still a pain. They haven't stretched out as much as my Dirty Fades. I'm interested in the E3s too and I want to know what size to get. Was thinking of sizing up, but, like I said, was advised to get my usual.
This was at a place in Korea that sells raw denim. I tried on the LHT first skinny guy 31, he told me it'll stretch to where I will like them. But if I'm interested in Elephants I may want to go to 32 so I don't feel the discomfort of heavier denim. Basically he said anything under 15oz should be fine to size down, but heavier denim, the buyer must take the weight and stretch into more caution.