yeah thats true! playing fast lead solos or shred needs improving the dexterity of your finger to a different level from time to time from slow to fast(metronomes are great for enhancing precision and dexterity), requires a lot of discipline to do and a lot of thinking,even i dealt with the same problem before, i got frustrated and told myself im going to be stuck in this way of playing im not going to improve,realizing my mistakes,i statrted all over again and applied this idea,guitarists are like athletes you need to stretch your body for you to improve your skill and getting your body warmed up before into a state of action and its all about thinking and familiarity with movements.When a person is not familiar with playing basketball and played it for the first time his body will not respond quickly as proffesional athletes do,instead his body will have a hard time doing so and his movements will become sloppy,but with proper training which involves stretching and constant practice,his body will get used to in playing the sport,and so on and so forth he's body will be familiar with the moves and will create movements he never imagined doing,this is same with guitar playing especially when your into shred.

thanks guys for the reply i really appreciated it,and i hope this will help other struggling guitarist like me :D