I'm not saying it's an error per se - after all, I also find varying numbers about armor penetration values.
It was (at this point) merely a comment at "as long as you stay out past 1500yds").
And I do not think a armor plate should be "weakened" by one or two hits. There are some nice photos around of Tigers and Jagdpanther with a couple of hits that didn't just left a few scratches but deep dents in close proximity, and yet no penetration happened.
Oh, and just killed turret quickly at 2.5k, but this time killing the tank after this took me a lot more shots

But of course I didn't expect the Tiger suddenly being safe from one of the most powerful tank guns of WWII...