Hal, I must courteously disagree with your recommendations about Cat3 and the jack selection.
If you will refer to the ANSI/TIA/EIA-570 Residential Cabling Standard, they recommend that in Grade 2 houses, Cat5e is the minimum grade of wire, and 8P8C jacks are recommended. Cat3 and 6P jacks are made obsolete.
With that said, I run only Cat5e as a precaution against future needs of customers, who may need to upgrade an unused voice wire to a data wire. (It costs only a little more per foot) When all the jacks and wires are uniform, it makes changes from voice to data, and the reverse, a simple matter. I do admit that I occasionally use Cat3 jacks (6P4C) for voice so that there is less confusion as to what plugs into where.
I heartily agree with the rest of what you said about 66 blocks, et al; it echoes my daily mantra, as I go about correcting the work of "experts".
