To be honest, nearly every developer will change it from the default as soon as they run a stress or performance test using a library that has dual ec as its de

To be honest, nearly every developer will change it from the default as soon as they run a stress or performance test using a library that has dual ec as its default (e.g. BSAFE Crypto-J). Dual EC is order of magnitudes slower than HMAC. It's impossible to not notice a default EC library if you run any kind of throughput test. Then, unless you a specific requirement to use it, you change the default.