Originally posted by Demonic Phoenix
Ichigo never had a hollow half when he first met Renji. It was probably his determination to win manifesting itself. That same determination & will manifests when he trains with Urahara. That is also part of his power.If the amp Ichigo got when he fought against Kenpachi was permanent, then it means that he obviously would be more powerful while using Bankai. Curbstomping more powerful once he became proficient with his Vizard powers.
Seeing as a vizard Ichigo in control of his hollow powers just scraped through the fight against the 6th Espada, he considers it PIS as there was no way a weaker character would be able to defeat the 5th Espada, given that there was no way Kenpachi could have become that powerful in approximately three months.
Had he learned his zanpakutou's name and learned shikai, it might have been a different story.
http://www.onemanga.com/Bleach/55/12/
http://www.onemanga.com/Bleach/55/13/
http://www.onemanga.com/Bleach/55/14/
I don't think his overpowering Renji to that extent is his determination to win. That would give him endurance and courage, not raw power and the ability to numb out pain from a wound like that. However looking at Hollow Ichigo's fights that's exactly like him. Even the way he's talking resembles Inner Hollow Ichigo far more than sounding like something Ichigo would say.
Of course this is just a theory without there being any true backing to it. But consider. It is stated Ichigo had his own shinigami powers even excluding what Rukia gave him. Yet he was not a Shinigami, he is a human.
Next look at this
http://www.onemanga.com/Bleach/63/02/
That is not what happens when someone turns into a hollow. They dissapear and reform elsewhere. So why is it starting with the mask? This is not unlike what happens when his Hollow side takes over like against Byakuya. It starts with the mask.
This is my theory. Ichigo already had Shinigami powers, and he already had hollow powers. And the reason Ichigo doesn't reform somewhere else is because he already has a hollow.
Though not that any of this has relevence to the actual thread. I'm just really tired and babbling.
Just as i see it. It is simplier to assume Ichigo beating Kenpachi was PIS than Kenpachi beating #5 is PIS. It makes allot more sense. If Ichigo beating Kenny was PIS we don't have to assume there are massive power gaps inbetween the captains. We don't have to assume Kurotsuchi was being unusually unconfrontational when Kenpachi stopped him from interrogating Ikkaku. Kenpachi's beating the 2 captains makes actual sense. Ichigo not being much stronger relative to Byakuya even after gaining his mask fits better with Kenpachi.
Otherwise all of the above is iffy.
Kenpachi beating Tousen and Foxman would also have to be PIS, since he would be one of the 'weaker captains'
If Ichigo was making massive power leaps with his mask, why is it he went trhough an epic battle with 6, when Byakuya used bankai on 7 and annihilated him.
But hey, just calling it like i see it.