Unlikely since we've had HTEs for quite some time.
But its the easiest explainer for why MK outdraws Tokyo.
I've been to Tokyo enough times to agree with '74, there's no way Magic Kingdom can be anywhere close to the same level without some serious cooking of the books. TEA gives MK a 12% higher attendance, whereas reality is probably TDL has 25% higher than MK.
Hard ticket events are probably a key factor, but on a non hard ticket day my theory is the different touring styles skew the figures. Compare the two parks with a hypothetical sample of 1000 guests:
In Tokyo almost everyone diligently gets there for park opening, stays for about 12-14 hours then leaves. That's 1000 attendance clicks for the day, with 1000 always in the park from opening onwards. Few park hop (you can't do so for the first two days), there's no off-duty CMs as you don't get a maingate, so once you're in, you're in.
In MK, however, some arrive early (250 clicks, 250 in the park), the rest arriving gradually over the course of the day (500 clicks, 750 in the park). Then in the afternoon maybe 250 leave to go back to the hotel for a nap, then come back in the evening (500 in the park until the evening, then 750 again), then you have people coming from other parks (200 clicks, taking crowds to 950) and with off-duty CMs probably contributing a few more for good measure.
That would give MK 1200 gate clicks as opposed to Tokyo's 1000, yet over the course of the day those hypothetical figures show MK only ever being 50-75% as crowded, despite more clicks. Yeah, that seems the most likely explanation to me.