I am relatively used to cockroaches, given that
1. tropical climates are good for large cockroaches
2. my cat seems to love hunting them*
So yes, only two blocks.
Bonus story: one of the lifts in my office building is padded over so that construction workers can use it. One day I was in there with a few other people (mostly women), and then a cockroach appeared from the back. It was interesting how we all shifted around to avoid it, and such relief when it disappeared down the elevator shaft once the door opened.
*Cat lives outdoors as does her prey; there are no cockroaches in the house. None. NONE.