We can also draw attention to the "History Lesson" toolbar which asserts that there "won't be any explicit connection to those" (Fallout 1 and 2).
I'm pretty sure directly using one of the most prominent factions from Fallout 2 is a pretty explicit connection, not to forget the Nightkin and the fact that the game takes place in Las Vegas, Nevada, which - guess what - is located all the way at the southern tip, which - guess what - is right above the southern end of California, which is where the originals took place.
I'm pretty sure that if gaming journalists have been making assumptions regarding areas such as Area 51 with absolutely no evidence beyond the reasoning that "Area 51 is a pretty obvious place to have in a game in Nevada" that they could at least make the assumption that a game that takes place pretty much right next to the ass-end of the two games that created the god-damn series developed by the group that developed those same games would - I don't know - have obvious explicit connections to those games?
Sweet Moses, no one in gaming rags check their facts, proof-reads, or hell, even bothers. I'm somewhat certain these articles are written in a single sitting with minimal notes taken during the whole process.