Third Parties Surprise Nintendo

The Wii U had a lot of touted a lot third party support during its first E3 (of 2) before launch. unfortunately, THQ collapsed and Ubisoft delayed (then made multiformat) the systems first major exclusive which caused chaos with Nintendo's release schedule which slowed sales. 

It's not just us players interested in the Switch.

The Wii U's slow march never picked up steam after that and that affected Nintendo deeply. As such Nintendo currently has (public) plans for 2 million units of Nintendo Switch for the first month (which could be low if its out the 1st of March or a lot if its out the 31st) but it appears the overwhelmingly positive reaction has Nintendo preparing to drop more units at launch, the company is apparently keeping a close eye on all the events to see the public and press reaction. If it's still positive they will produce far more for launch. (It is currently assumed Nintendo has the machines made but wants to throttle shipping them so they don't over produce units.)

Apparently, it is the third parties who have had the strongest response. Their enthusiasm for the new machine has surprised Nintendo, who was expecting to have to win publishers and developers over. It's not the official partners (who have access to the device) that are surprising Nintendo but those who saw it at the same time as the rest of us.

UPDATE: Here are some comments from Level 5 and Square Enix. These aren't overly relevant as their companies are official partners but I didn't see the need to create separate articles for two statements.

“We plan to make games for Nintendo Switch, but I think it’s very important to find out the best way to get the most out of the console. For that reason, we won’t have any titles at launch, but we’ll work with it as soon as we figure out how to take advantage of it.” - Level 5 CEO

“I’m very interested in this machine! As a player, but also as a developer, The Nintendo Switch that you can transform into a controller, that you can put into a dock, that you can move around with, on which you can replace elements. It’s been a while that I’ve told myself that I would like to make games on a Nintendo machine, so if the Nintendo Switch could be that opportunity, I’ll be delighted!”  - Final Fantasy Director Hajime Tabata

Abe's Take
I would certainly like to pick up multiformat games on the Switch but i suspect the specs won't allow every game to come to it unless the device is as easy (read cheap) to port to we might see "weaker" versions of games seen on Xbox and PS,