I'm so with you there, I stumpled upon him last night...I've been up all night just looking at his tutorials and making a playlist - haven't got any sleep jet, for the first time in 2 years I believe there's a light at the end off my very dark and desperate mac tunnel!
But actually you CAN let our MacGuru David know how much he helped you! Visit and registre onto his website PCClassesOnline.com and tell him - He is amazing, and His concept is so brilliant... I'm crazy about him! He's so unique!
And he is everything Apple is not!!!
So share him and rate him, and help others find him so they don't end up lost in Apples shitty (and useless) site :-)