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I haven't timed it, but it seems to charge in about two hours from a fairly low (~15%) battery.
 
Heard it's fast.

If you use the stock charger I've timed it at a little more than 1% per minute. With a battery pack or other USB charger it will charge fully in any where from 2.5-4 hours

By the way, it's the same as my rMBP in terms of charge speed
 
I just got mine yesterday and it was at 70% out of the box. I plugged it in and watched some baseball and after an inning it was up to 90%....i'd guess 15-20 mins it took to jump that high.
 
I just had mine charge from around 60% to full in 2 hours. With the lid closed, a cheap USB 3 to USB C cable and a spare iPad charger I have lying around. Happy to have the first laptop in years that didn't require me to purchase two proprietary adapters. Just a 9.99 cable.

Charging via the real adapter seems fast, but nothing extra special. Things stated above sound about right to me.
 
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