Possibly. But aren't everyone's google searches already customized when you are logged in to Google. If people at google don't have special options, then how would they know they get a special (ie. better) type of search. I wonder how many people have access and understand the full search source code at google (less all the machine learning stuff)?

In older versions of google, one could quote a full error message of almost any type that came up on your computer and get a very good page describing that that error meant. Now that is not the case. Maybe the internet has degraded and this is no longer possible, but I would imagine it would really help out google coders if they had a system of searching the web for error messages that worked (and quite a competitive advantage if it only worked for them).