These guys are right. The difference in distance is very minimal. What you must do thought is to learn to draw your bow as you would on level ground then bend at the waist to aim down. The idea is to keep the head and shoulders in proper position (T form) in relation to each other.
Many people forget or don't know this and just lower their bow arm to aim down. This changes the relationship between the head and shoulders and the view through the peep sight. The result is usually a high hit.