Not just you, thats Demarini. Flex and whip help provide the pop they do.
Demarini bats just "feel" more whippy than other brands. All the bats you mention flex quite a bit at impact.
Thats why I always say bats are about feel to each player. Every bat has its own feel.
I just bought DS a Demarini Vendetta, and I can hold it at either end and bend it in my hands.