I was a little confused by "doubled our users" since that's more about inbound traffic than site experience. I guess it's really shorthand for "halved form abandonment" which is still pretty great.

Users visited the site and couldn't even begin the form, nor get seen as a visitor, due to javascript metrics and rendering failing.

I think that's even more significant, since it's measuring people who cared enough to click the form in the first place, which is juicier than just page loads.

Doubling conversions, in digital marketing-speak. Marketing firms probably give out fat bonuses for this kind of result.

may be he meant, doubled our users who actually submitted the form