it needs to be an epic fail for those who were expecting 30-50 % straight off the bat whilst on Beta drivers... it makes sense... after all we're used to seeing 20 million thousand percent increase from gen to gen..... when buying videocards for free too (not sure if I was cynical enough there)

here are some facts.

API coding takes time, and is highly dependant on a multitude of factors
this is the first time we see "coding to the metal" in game applications
BF4 has a heck of a lot of issues that still need sorting

anyone who calls this an epic fail is proving to know nothing on the subject