Well I am reading that you believe the 911 call discounts the supervisor/neighbor theory.
The information I was going on is based on two things. One, a quote from LP on NG,
(here's the transcript):
NG: Do you believe the meter reader contacted the family?
LP: I think he contacted his supervisor, Scott, who lives right down the road from the Anthonys.
NG: I couldn't hear you. Contacted the supervisor, what?
LP: I think that he`s contacted and talked about it to his supervisor in August. The supervisor, Scott, lives right down the street from the Anthonys on Hopespring. And he was also back out there not only on November but he was also back out there the last weekend of August, the 29th or the 30th. The meter reader was out there in that...
NG: Here`s video of the meter reader. So you think it`s possible he contacted his supervisor, who may have contacted the family?
LP: I think he talked to the supervisor, and I think the supervisor knows the Anthonys, yes.
The second piece of information comes from my own
review of the people who live on Hopespring Drive, finding a Scott A. and a Scott S., and then googling both to see if I could find out something about where they worked. Once I figured out which one it was, I googled some more for confirmation that he did in fact still live on Hopespring, which he does.
I am not sure this information is quite ready for the Mythbusters Thread

but I do feel confident that Scott, the supervisor, does live on Hopespring Drive.
Thought I would add in as an aside, the evidence LP gives to back up his claims so far has to do with the fact that the PIs video shows them searching around the wrong set of pavers, and LP's personal source (maybe legit, maybe in his own head?) which says MR was at the same wrong set of pavers in August. It has been noted that the white board and silver metallic vinyl bag like a pool cover MR reported in August were not found at the crime scene, and if MR was in fact 150 feet away at the other pavers, then it (kinda) follows that MR and the PIs were both given the same, incorrect location. This is the root of what LP has revealed so far.