In the case of bank owned homes, the bank does not always issue counter offers to buyers, although often they do. The listing agent should have submitted your offer along with any other offers that were received.
Sometimes it takes a while for the bank to authorize a counter offer, so it could be that you'll still receive a counter offer. However, it is up to the listing agent to communicate with you, so that person will remain your agent's primary contact.
It may not be the listing agent who is not responding. Banks, loss mitigation, and asset managers are overwhelmed. It is not unusual in this market to have a delayed response. Have your agent give the listing agent a gentle reminder that you are still awaiting a response.
I hate to be the bearer of bad news, but yes- the bank relies on the listing agent to let you know where they stand. Just ask your agent to get a straight answer from the listing agent esp. if the property is still considered as available.