"EDM lifters,supply the cam/lifter mating point,with consistent cushion of oil. Normally splash oil lubricated"
Sorry - I went back and re-read... slower this time as sometimes I do read too quickly.
I am still misunderstanding your text. I read the above as the EDM hole pressurizes the contact area and gives the lifter a pressurized cushion of oil.
I don't believe that to be correct.
EDM lifters give a huge increase in and consistency of oil volume to the lobe - From what I've seen they don't provide a pressurized film at the point of contact. I have a nitrided cam with less than 1000 miles on it and Howard's EDM lifters and it's got a definate wear pattern on it, as do the lifters. It's not like the pressurized oil film and wedge that forms accross a rod bearing where the oil is "captured" by clearances.
Sorry if I'm splitting hairs - I thought it a rather significant difference in terms of explaining what they do.
