How does leveling affect stats?

[Jarlek]

It does , noob

Wrong.

Each point in this attribute increases your attacking speed by 0.5%, and gives you an additional 5 weapon proficiency points

http://mountandblade.wikia.com/wiki/Attributes

Since it doesn't say anything about warband being different, I take it it does affect the weapon.

Also wrong, but thanks for pointing it out. I'll go and edit the wiki.

If you don't believe me, then do this. Start up Mount & Blade: Warband, open the caracter menu. Hold your cursor over Agility, read the info box. This is what it will say: "Agility: Each point gives five weapon points and slightly increases movement speed. The following skills can not be developed beyond 1/3 of Agility: weapon-master, Shield, Athletics, Riding, Horse archery, Looting."
Here, I even made a screenshot of it for all you idiots who don't believe me.

Spoiler

[Image: mb1-1.jpg]

In addition, if you people would be smart enough to stop spreading false information and actually KNOW what you are talking about, then I suggest you read this post here:
http://forum.c-rpg.net/index.php?topic=2531.0.html

Now, stop calling people noob when you are so completely and utterly wrong that you ought to be bitchslapped through your monitor.