Yes I read it and I'm not convinced yet.
Which part are you not convinced of yet?
My real world experience with gears is with 3.27, the fastest I could manage was 14.1. I put 4.10s in, same tires, same everything and could manage 13.7. In my case, gears made me quicker in the 1/4 mile. I do not think the gears gained me .4 but probably a solid .2-.3 with the other gains being driver mod. I'm not the best drag racer, in general, but I am pretty good and consistent with my car specifically.
Yup, ET gains are VERY possible with a steeper gear, with reasons that I clearly laid out in that other thread. The main variable is traction. As long as you can still hook up all that extra torque in 1st gear and cut a better 60', they'll be faster. But that's something that most people / cars can't do, especially once you start talking a car that's actually making some power.
What were the trap speeds on those runs?
I have a great story relating to gears that I just remembered. Way back in the day, when my car was stock (and slooooow), my brother and I used to go to the drag strip almost every weekend. He had a 4x4 4.0 Ford Ranger. Automatic. The truck had 4.10s in it with 32" tires, which would be the almost exact equivalent of 3.27s in our cars with 25.68" tall tires. In 4x4 high range, he ran 11.0s-11.1s about as consistently as you could ask of at about 67 mph (1/8 mile obviously).
Then he got a brilliant idea: try it in 4x4 low range. Those trucks have a 2.48:1 low range, so he would have the equivalent of a 8.11 gear in our cars. That's some pretty serious short gearing! Anyways, he knocked a full second off of his 1/8 mile ET! Was running 10.0s-10.1s. That was pretty much entirely because he went from cutting 2.40 60's to 1.80 60's. And that half second+ off of the 60' was because he was fully able to take advantage of all the extra torque that low range was offering him via being able to hook up in 4 wheel drive. I think it's clear that a 2-valve with 8.11 rear gears would have a bit of a hard time hooking up.
But here's the really interesting part: his trap speed was still the exact same 67 mph. Didn't change one bit. I go over this in detail in the other thread I linked, but the reason why is because he was still sweeping the exact same horsepower band of the engine as he was in high range. He just swept it more frequently in low range (all 5 gears in low, versus only like 2 1/2 in high range). Steeper gears (generally speaking) don't increase the average horsepower that the engine is outputting, and therefore don't make it any faster except at the very beginning of a race.
Also, here's a video of one of his runs like that. We had a lot of fun destroying big V8 half-ton trucks, which were really getting pissed about it. LoL!