I just wanted to share my experience about this. For me, bending took many months of BLIM (maybe even a year) before my hands were strong enough and my technique felt right.
I actually had three guitars, and strangely enough, my Strat with 9s was the one I struggled with the most. In theory it should’ve been the easiest because of the lighter gauge, but I really had trouble bending on it. I tried all kinds of strings on it too (8s, 9s, 10s, different brands), and honestly, none of that made a huge difference. I even blamed the setup for a while, but my luthier basically said, “Nope — it’s just practice.” I only recently picked it up again for blues after not touching it for about a year. Now that my technique and hand strength have improved, it is the most comfortable — but I have to be really careful, because it’s also really easy to overbend as my hand have gotten stronger.
I also have two other guitars (335/Les Paul-style Epiphones with 10s), and for a few months, I could only bend properly on one of them. All 3 guitars were the same price point (about 1000 $ CAD). The one I could do it was not even set up by the luthier, the others were
After many nights of thinking about it, I could not find a logical explanation beside technique development. 
Now I can bend comfortably on all three, though 10s still feel more controlled for me since it’s easier to overbend on 9s. But I’m getting used to it.
Long story short: based on my BLIM experience, technique and muscle development over many months matter far more than the guitar or the string gauge (unless it’s something extreme). Still… always happy to have another guitar.
Just thought I’d share!
And of course, after seeing Justin use a 335 for the entire course, the temptation to get one is real — a few Blimmers definitely caught the bug. 
(I even broke 2 or 3 high e strings during the course, so I was putting enough strength, but probably not on the right angle.)