[Desdinova]

it is entirely plausible that aliens could/would be more advanced than us. we have made huge leaps in technology in the Last 50-100 years. but there is a period in our history called the dark ages in which knowledge was repressed, iirc, it Lasted about 400-500 years. if that either did not occur or did not Last as long then current technology could be even greater than it is now. so if an alien society was about to avoid it then they could/would be more advanced than us technologically.