Is scheduling every single person in the company to have a discussion about... coding style solve any particular problem Twitter has?
This reeks of 'I am the new owner, I need to do something, this is something, everyone will now be doing it.'
Yeah bring code so we can talk about it is fine at the bottom level. Dumb for owner in first week. The good programmers know nothing will ultimately come of this codiscovery process thus making a bad impression on the good employees
Not saying his intentions are noble, but the act of these mettings, in and of themselves, does not signal anything in either direction.