Is that the set of tutorials from 2009?
Jeff's explanation of LR/ACR capture sharpening is updated in The Digital Negative, 2nd Edition, copyright 2016. He discusses each of the sliders and I don't think there is much more that needs to be said. The process is relatively straightforward. LR/ACR output sharpening can largely be left on autopilot.
If you want more advanced capture sharpening, it is best to go to Photoshop where one can use layers, masks, layer blending options, and advanced plugins such as Topaz InFocus and Detail as well as FocusMagic; these plugins use more sophisticated deconvolution algorithms. That said, the edge mask generated by LR/ACR is impressive, but the deconvolution is relatively simple, using only 1 or 2 iterations. Personally, I use ACR/LR for more routine work and employ Photoshop and these plugins for my best images.
Regards,
Bill