Not exactly.
After 8 seconds enough thrust to perform a steady climb of a 3.2% gradient must be available, this does not necessarily have to be full thrust. Especially at landing weight a twin engine aircraft will be able to do much more than a 3.2% climb at go-around thrust.
Not to be overly anal about it, but that's why I specified "go around" thrust rather than full thrust - for purposes of go-around calculations you can only take credit for the amount of thrust available after 8 seconds (in reality, with modern FADEC engines, 8 seconds from approach idle will result in very close to max TO).