How To Hold The Guitar Neck,correct Way.

Hello there,i' have a question here.i've been wondering how to hold the guitar neck proper way.i found out that some of the great guitar players stick out their thumb a little bit like this when they hold their guitar.slash,synyster gates,joe satriani, http://farm4.static.flickr.com/3228/328092..._a71b81fdb7.jpg

but i have problem when doing this.it's ok when i playing notes above than 12th fret but when i played it less than 12th fret it's hard to move my pinky.maybe because my finger is short.usually i hold it like this http://worldguitar.ru/img/6e/6e6/Acoustic_...d_strum_too.jpg
like you want to strum a barre chord.your thumb spread a little bit.

Fast Picking

Hi guys,i'm new here and has been playing electric guitar about 5 months.I'm having a problem on how to pick faster.I dont know how the PRO do it,but when i'm trying to do it i can't avoid from playing sloppy.Do you have any sugesstion on how to overcome this problem?I know they say that you have to play it slow and increase the speed later.You can't run if you can't walk.But it seems that i can't.Is it because all the PRO were meant to be abble to play fast or because of their hard work of practising?