Use spoilers dough.
That wood golem feat is a reaction feat. Hashirama wouldn't be able to catch it if he did not have the reactions to
accurately do so. It's like catching a baseball.
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Here in this scan, you can see how far the bijuudama is form Hashirama. It's so close that it's
nearly point blank.
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In the time, Hashirama was able to cross the distance between the Bijuudama and the 5 Rashomons.
Simply put, this speed feat shows that Hashirama crossed a larger distance than the bijuudama did in the same time frame. Making him quantifiably much faster than a Bijuudama. This feat alone makes him top tier in speed.
For reactions, I don't see how you can deny that Hashirama can easily react to 100% Kurama's bijuudama from near point blank range. The feat is as clear as day.
Doesn't take a genius to figure out that full Kurama's Bijuudama is >= Naruto's in speed. Even Killer Bee has feats of being able to match the speed of Naruto's bijuudama barrage. You think that a much superior bijuu can't replicate what an inferior bijuu(Gyuki) could do? Need I remind you that Naruto is only capable of half the things a full Kurama can do considering their chakra ratios.
Also, what makes full Kurama's bijuudama even faster than what it normally is is by the fact that it was infused with a Perfect Susanoo sword. When infused with the Perfect Susanoo sword, the bijuudama becomes more
aerodynamic, thus making it even faster. I hope I don't need to explain to you what aerodynamic means.
I can show you an exact speed calculation on how fast the Bijuudama Shuriken truly is if you want.
You aren't reading into context man, fact of the matter is that Hashirama's regeneration is superior to Tsunades as stated by Madara. Tsunade can already replicate large enzymes at a molecular rate. It's simple powerscaling. Do you honestly believe that getting stabbed with a black rod is an impressive durability feat? Yamato has been stabbed with the Kusanagi sword, yet he lived.
If you want to talk about jutsu durability, the scans speak for itself. Base Mokuton can tank a bijuudama from point blank range with no damage, Rashomons were still intact after taking a direct hit from a mountain fragmenter, and the Shinsuusenju was still in tact after receiving dozens of Bijuudama and Perfect Susanoo swings.