system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar: The Last Airbender] Is the avatars bending more powerful than normal?

For example is Aangs airbending as the avatar more powerful than it would be if he wasn’t the avatar? And is his fire water and earthbending more powerful than other benders of that element?
gpt
I think the potential is there (for example, Aang picking up the Waterbending Scroll techniques faster than Kataraa - admitting that water and air share some amount of technique or philosophy), but a large part of it is training. Most Avatars live for hundreds of years (EDIT: or at least 100, most of which is not spent under the "distractions" of a normal life) and that is a lot of time to hone their skills, and the mere fact that they are the Avatar usually implies a higher quality and quantity of training. 

We also see Avatars after being found are usually whisked off for decades of training and thus have no need to spend time learning to farm or craft like your standard Earth Kingdom peasant. Being the Avatar's teacher in a certain element is also a great honor (more so Pre-Sozin when it was more standardized) so their quality of education would be high as well. So while some Avatars are less proficient in some elements (particularly the opposite one of their birth, such as Aang and Earth), they have much more opportunity, time, and quality of training to overcome this, even more than those conscripted into various militaries of different nations.