Semil Shah asked this question on Twitter. Here are the responses:

Semil (@semil)8/2/13, 5:42 PM

Q: If Twitter prices at $12B on opening day, are you a buyer? Hold, or long-hold?

...

Ryan Jones (@rjonesy)8/2/13, 5:43 PM

@semil buy

...

Tim Hoyt (@TimHoyt)8/2/13, 5:46 PM

@semil buy

...

sean rose (@sean_a_rose)8/2/13, 5:54 PM

@semil I don’t sense a significant long term product vision from Twitter (or at least they haven’t tipped their hand yet). Buy, reluctantly.

...

Yann Brandt (@yannbrandt)8/2/13, 6:00 PM

@semil definitely a buyer. $FB is showing the path to managed mobile content. Plus Twitter is better in mobile than PC. Unlike FB and LNKD

...

Adam Besvinick (@Besvinick)8/2/13, 6:08 PM

@semil long-hold without thinking

...

Seth Gold (@seth_gold)8/2/13, 6:16 PM

@semil hold @twitter for 10yrs min. Also super long Google, as Page wants the Big G to employ 1 million in the future

...

Andrew Bryk (@andrewjbryk)8/2/13, 6:18 PM

@semil definite buy

...

Nirav Tolia (@niravtolia)8/2/13, 6:30 PM

@semil Huge buyer at that price.

...

Chris Kurdziel (@ckurdziel)8/2/13, 7:08 PM

@semil I think it’s a buy. maybe irrational, but it’s truly changed my life.