I think if a pack has X c rating it should hold that at the given voltage of 3.7 volts per cell for at least 30 seconds.
It's funny how some make this out to be harder than it is to have a simple and understandable standard.
Just as an example of what I mean.
If I have a 14.8 volt 5000 mah pack rated at 25c then I believe it should hold 14.8 volts at 125 amps for 30 seconds while also keeping a safe temperature. It's plain and simple.
Its actually funny even talking about this as if they don't already know what their cells are, or are not capable of. If we the consumers have already figured out how they should be rated, then you can bet that they the professionals have already considered and probably done this type of testing on their cells, but of course refuse to show them obviously because it would more than likely ruin their overall sales. No one who invests a fair amount of capital into a product wants to share any unfavorable news about that product, before they can get them off the shelves. Its not like these guys at brand "P" are not into this hobby, and have not used their cells extensively. I have to believe that they have used their own products in various situations, and compared them to others out of pure curiosity. But someone at brand "P" is obviously a great advertizing professional and realizes that if you wrap up a pile of dog crap with the right package a ton of people will buy it thinking that they are getting a good deal.