No, she didn't say everything counts. If you can't be bothered to read her words, why should I be bothered to write to you now?
*sigh*
Alas, I'm doing it anyway... Hmmm... A Q&A about the game, on the game's forum, posted by an employee of the company, whose job it is to know and inform us of these things...
Yeah, I'd take that as gospel. Also, I have my own experience which says the very same thing. Upgrading one troop may not make a significant enough increase to your war strength that it moves you up a rank, or it may. The result is cumulative.
I'm at level 162 in this game, so yeah, this isn't just 'cut and paste'. I happen to know a thing or two about the game's mechanics.
I am currently number two in my clan's war roster. I used to go back and forth between number one and number two, with our current number one. Each of us had the same level of of defenses, and the difference was whenever one of us leveled up a troop. He is currently ahead of me because his heroes are higher than mine. If I ever get my heroes above his, I'll become number one again, because he doesn't have every single troop maxed, but I do. This isn't just anecdotal evidence. These are facts.



