Let's see...

There are 433 chapters out and they stopped the non-filler storyline at 343 that's 90 chapters.

Assuming a nice rate of 2.5 chapters they have (36+14+5+2=) 57 episodes worth of material, counting chapters that will be released during that time and assuming there's a steady rate of one a week. Oh, plus Kakashi Gaiden.

That's what? Roughly 14 months worth of non-broken, non-fillered and well paced naruto? They're not as far ahead as I though they were... but still.

At some point the manga will hopefully end and then I guess they'll know how to balance it out for blazing through it..