So here we have it here.
I played the CIA leaked version for ten minutes in WIFi. Festival plaza, and made a free battle. Everything went along as planned. It works.
I went to the Eshop it works. No error code whatsoever.
I have just used Triforce Heroes and tested Wifi. Works fine with no error codes at all.
Note that I have never connected to the internet before the release date of today, meaning no chance of ban waves affecting me at all.
It is completely safe as long as you respect the release date from your region.
For those asking whether it is safe to transfer the leaked CIA save to the cart that you yourself bought, go right ahead. I have made multiple trades today and everything worked. All my games worked and Eshop also worked. The date of the save has never been changed as well (again it is based on the 3DS clock so it will not matter at all.)
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Yes, due to fearmongering from people thinking that the leaked CIA is the one causing the bans.