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LOL! You mean:
15 hours = main story arc
80 hours = exploration
05 hours = putzing around in a hub, bar, stores or looking for somthing
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100 hours total 
True. Or something like that. I don't care it's 40 hours main story, 55 hours exploration, and 5 hours putzing around. In fact, I would prefer it if it were that. All that I'm trying to say with that post is don't be expecting another short(ish) game from BioWare. Expect it to be a long involved game, similar to DA:I.
There are reasons why I keep drawing so many comparisons to DA:I, but the main reason I suppose is that we've all played it. Love it, hate it, this game is gonna have distinct similarities. Namely in how long we're gonna play it and the War Table/Room. I'm sure there are some others, (like Skyhold, which I never found that fascinating myself) that I'm just not thinking of.
Ohh ohhh, I've got one. Crafting. Crafting is gonna play a role in this game if the leak is to be believed. That was never a part of any previous ME game. Sure, we could upgrade things, but never craft them.
EDIT : Oh, and that brings up another point. Resource gathering methods. In DA:I one of the most clunky and nonessential ways of gathering resources was the ping. Running through a forest? Ping all along the way. In this game, could we just have the ping always turned on, and then as soon as someone damages us it automatically turns off? And have it show on the map with a range (or rather, a widest area distance that the passive ping can reach) and an indicator (and direction) above our head that is color coded for which mineral it is?