At the moment, it takes about 10 seconds to complete. So if you haven't gotten any suggestions within 1-3 minutes, then there may not be anyone else looking for a study buddy for those courses, yet.
I just launched this feature today, so the number of potential suggestions will be as low as it will ever be. I plan on getting the word out on several different sites, which will increase the number of potential suggestions.
We'll send you an email when you have new suggestions, so you don't need to continuously check back in with the site.
Also, for which courses are you looking for a study buddy? I can make sure I spread the word to people and communities who have similar interests.