There's a clear difference in casually saying, "a is probably around b" as opposed to being confident and serious about it. Especially when said person implies he really doesn't care seeing it should be an easy victory.Everything all characters say are just guesses, since by definition a guess is just a belief or speculation. As long as a character is only using his sensorial perception, he is limited to guessing. So I don't see why dismiss what Goku said. He was just making an estimative based on his experience on battles or Ki. Which is not different from all instances which characters detect the Ki of someone else.
He was attacking in bursts, which wasn't anywhere near his maximum. Logically you can mask what you're actually displaying, however that doesn't imply you're using your maximum strength or speed, or even that you can. There'd be no point in powering up if that were the case.I guess so. Goku was at 5,000 against the Ginyu Tokusentai, but they couldn't do anything against him. Another example is when the followers of Freeza attacked Trunks while his battle power was still at battle power of 5. I don't think they could just attack from behind and kill Goku or Trunks instantly.
Yup to the average fan at least. However, this is as obvious as Cell being weaker than Gohan; which evidently I'd place as even more blunt than the more obvious of plot holes.Most of Toei plot-holes are blatantly obvious...
When does he state he's holding back his strength against Gohan as opposed to toying around with him? At what instance does that ever occur? Nothing ever implies a maximum attribute in that category can ever be used to the fullest without powering up. If he knows Gohan's faster, then there'd not only be no point in being confident or powering up, but no point in Toriyama showing he's making the same mistake Trunks did.Not really, his quote quite blatantly states that he's holding back in strength/power so we know he isn't at full power. It's the only line we get about his speed, that he's going all out. The most simple explanation is that he is using the entirety of his speed and powers up in strength later on.