» Sat May 12, 2012 2:05 am
Sneaking only goes up when there are NPCs (friendly or hostile) nearby. So even if you were sneaking 100% of the time, you'd only be gaining experience for like 10% of that time, especially when dungeon crawling and even less so when sneaking outside on roads and such (~5%). On top of that, this xp gain is pretty low and therefore levels you slowly. Most experience in sneak comes from succesfully landing sneak attacks and, most importantly, preventing or losing aggro by staying hidden while landing said sneak attacks.
Because of this, your sneak will actually level along quite well with your archery skill for instance. Since sneak attacks raise both your sneak and the used combat skill.
And if all else fails, as has been stated above, the sneak perks are pretty great in that they add multipliers to your sneak attacks if you take them. So if your sneak does level too fast, you can actually use it to your advantage still. It certainly shouldn't cause any problems for you.