How much sound leakage do the PB2s have?

[jabaa]

With the vents on the PB2s, I've read that they leak sound more than other non-vented earbuds. Is it a lot? Like if I were riding a relatively quiet morning bus (whenever THAT will happen again) and am rocking out, will people be able to hear my music a lot more than other earbuds?

 

[jabaa]

Wow this board is dead. Surprising for such a new product...