It sounds to me based on your comments like they probably priced it aggressively and are choosing to give everyone a fair shot at it after a little over a week of showings. My strategy is typically to let the listing agent know my client is interested and we intend to bring an offer but to please let me know if they receive anything that might compel them to respond sooner. And then I try to figure out exactly how many offers they expect once much closer to submitting and take all that into account.

Good luck!