Question: I bought my base model 15" MacBook Pro w/ Touch Bar the day it was released, and I just received it yesterday. I've been copying and downloading all the data and files that I needed and the battery didn't last me more than 5 hours, if even 4. I have no idea what is wrong with it, but it's really overheating and I almost never hear the fan running, which also alerts me.

Today I played Crossfire, a game with very basic graphics, on Windows 10 Bootcamp and it was ON FIRE! I had to close the game because of the laptop's temperature. Again, I did not hear the fan.

Things I've done:

* Reset the System Management Controller (SMC)
* Run hardware diagnostics by restarting and pressing the `D` key while booting. This was the first time I actually clearly heard the fan. The overall results were that it found no hardware problems.
* I called Apple, but they had no idea what they were telling me as they were following a written script, although a Senior Advisor was talking to me regarding the issue.

Now I have had it just for two days so far, and I have a two-week return period. Should I wait more and see how everything will work out, or should I return it?

Has anyone experienced the same issue? Is there anything else for me to try?

Answer: 
A brand new computer should not give you such problems. I would return it within the two-week time window and ask for a full refund.

Some people I work for need to buy new MacBook Pros, but it's hard to recommend them right now. For one person in particular, battery life is crucial. Everything I've heard so far about battery life, the new Apple MacBook Pros are lemons.

It's very disappointing, especially since it's been such a long time since these models were updated — people have been waiting for them. They're not selling these new machines any cheaper either, they ought to work at least as good as the previous generation!

Hopefully they'll come up with a revision that fixes the issues — meanwhile, if you can still get a full refund on your brand new MacBook, that's what I'd do.
I am having the exact same issue, & even after apple provided a replacement device to me today at 6pm this issue has not been resolved. 

Backstory: My original device was picked up 2 weeks ago, from the Pasadena store. Immediately that night I noticed that the heat was so bad the equipment was hot to touch, and even spreading to the sides and top other portions of the device. I reported it via online chat and immediately apple business contacted me the next day scheduling a Genius Bar appointment. During that appointment the genius tech wouldn't tell me what was wrong but stated after only a couple minutes that the device needed to be sent to engineering once it was returned for investigation, and they would provide a replacement no questions asked. The replacement device arrived tonight and 30 minutes into using it (Safari, Sublime text install, and web browsing on a solid surface it was so hot that it begin causing other issues( slowed keyboard response onscreen, screen flicker, lag). I contacted support again, and they immediately setup an appointment with Genius Bar for 6am tomorrow. I am really losing faith in this model but don't know what to do at this point because it appears that no one knows what the root cause of the issue is. Friends of mine have the same model without issues. If anyone has any details please share.