Developers begin developement on PC before they move it to dev kits. Porting a game doesn't take over a year (of course it depends on the size of the team porting). PS4 lacked third party exclusives at launch because sony didn't buy any.

The only AAA third party developers making  exclusives for the NX  will be developers Nintendo has signed deals with, they likely would have recieved dev kits before general circulation.  More importantly though Nintendo will have likely snatched exclusivity of games already in development if they were to go for exclusives (Titanfall, TombRaider etc), not simply having games built from scratch. On top of that there is no reason to expect frequent third party exclusives, only Indies and Japanese devs with little audience in the west will make exclusives without first accepting a fat pay check.

And we are done.
2016 launch
Zelda HD on launch
More than 2 devices (handheld, console, tablet, etc)

This is Fusion, this is the future.

Fusion is about combining handheld and console libraries to avoid a disaster like the Wii U. Third parties dev kits doesn't matter, Zelda team must have the dev kit before the delay and 3D Mario team already confirmed to be working on the next one. DQXI and FFXIV are already announced for NX. And we speculate Pikmin 4 and Retro title are for NX. The launch is already covered.

Oh, and if you read the article, they mention ME: Andromeda for launch.

It will be very interesting to see what ports it gets at launch.

Well in a sense he's right. If you have a decent engine most of the programming in games is not platform specific. You don't need a dev kit to build a game, you just need it to port it to a platform. This is why is we had the whole downgrade gate earlier this gen with Watch Dogs and Witcher 3. The games were generically made for PC and assumptions were made regarding the eventual strength of the PS4 and X1. They don't wait til they get dev kits before they start developing. 

They'll probably do a better job than the wii u, but the ps4 and xbox one are already at full steam ahead. Having a complete launch is the minimum they need to compete. I'm not sure if that will happen from the 3rd party side if they are sending out dev kits this late

You don't need to buy all of your partnerships/exclusive offers. Both zombiu and rayman legends were supposed to be wii u launch exclusives courtesy of Ubisoft. The same thing could have happened if Nintendo sent out dev kits (too all devs) earlier, and not rely on simple ports. The ps4 had a slow launch, but that was offset by poor competition and the promise of a great future. The NX is facing tough competition, and given the performance of the wii u, does not have a gauranteed future.

There is only so much you can do on pc without having the specs of a console. Especially if you want to create custom engines (which work perfectly for games that are not ports) for max optimization.

Sega:

Almost 20 years ahead of it's time. (by the time NX is released)

Let's hope Nintendo have better luck than Sega did.

Umm.. Fuck.

Third party dev kits do matter. The last thing you want for a launch is for third party devs playing down your system in favor of the ps4/xbox one. The best way to do this is to not rush third party devs, and to give them as much support/funding needed to make solid games.

Even the wii had Just Dance, Skylanders, and Guitar Hero to massively propel sales. To dismiss third parties would be to replicate gamecube level performance (better than wii u given the fusion concept, although the fusion idea is also not set in stone)

Aside from the DQ game, there is no game that is sent in stone going to the NX, so there is no point in hoping that pikmin/zelda/retro/3d mario will be ready at launch. The article itself was using speculation as a basis for some of its info, so I wouldn't be sure about ME: andromeda.