Big data was practically invented at Google when a couple of their engineers had to come up with a way for Google to monetize web clicks which couldn't be done with current technology, at least cheaply.
Also, the five best CS programs in the country are Stanford, CMU, MIT, Michigan, Berkeley and all their CS grads either want to go to Google or start the next Google, not consulting or finance.
Finally is the financial considerations in his choice. He has a FL prepaid fund which after running the NPC would essentially pay for his COA at the Ivy graduating with zero debt. At UF he would have the FL prepaid, bright futures and Benacquisto scholarship which means not only would he graduate with zero debt but likely somewhere between $60-70K in the bank.
With Stanford's great financial aid(and CS reputation) it would be hard for him to say no even as a walk on if accepted academically.