My problem with that though is (at least with a lot of the big names) the teams are too big that there is a chance they are distributed significantly. Even as a new hire you can end up in a situation where you are in one location and your seniors are in a completely different state/country.

That happened previously at one job and it was not a fun experience, especially since I kept being told how important it was to go to office to learn. Meanwhile all my team/sister-team/step-team members are in another state/country.