I've seen plenty of people having problems on older AGESA too. I've seen some people actually have higher performance on newer AGESA. It all depends on your particular sample and setup and how it fits into the boost criteria. Silicon quality still plays a massive role.

So to be clear, older AGESA isn't a magic bullet that is letting all chips "easily hit their rated boost clocks".

It could be cleaned up somewhat in future AGESA releases, and silicon quality will definitely go up over time.