Pretty sure that was only in the anime. Again, we only know he got stronger, just not by how much, but considering all the conditions Gohan had, it is impossible to have been 100%. You also have to consider that if what you're saying is accurate, then that means that Cell would be around 60% SSJ2 Teen Gohan (Ignoring all his other conditions) at best.That is true, but same could be said about Broly (Only in his case, it took significantly longer for it to truly destroy him, showing much higher durability) and what Fate said is also true