Stephen is absolutely correct this does not follow an NWFA Inspection Report Format and testing is the only way an NWFA report would allow the kind of report that would produce a conclusive result.
Moisture content of subfloor and wood should have been taken using a slide hammer with insulated pins to document readings of the subfloor and hardwood. Top and bottom measurements of hardwood standard for gapping. Relative Humidity of home taken so that using the moisture chart from the Wood Handbook, RH and MC will tell us what it was at the time of installation.
10 board and/or 20 board measurements should have been taken then using a micrometer measure each board. This is basic procedure for gaps or release from the floor.
Most of this report seems to be based on observation. It would never pass an annual inspection. I would ask for his NWFA inspection number or also you can go to
http://www.woodfloors.org and look up his name or any inspectors in the USA.
That said it seems unlikely that most of the floor has no end gaps and only a select few do have them. Yes it might vary but not to this degree.
NWFA Format is:
Commissioning Party:
Location to be inspected:
Description of Product Performance Concern:
Claim History:
Physical Description:
Testing:
Applied Industry Standards:
Conclusion:
Cause:
Signed with License Number
Also a typical inspection averages approx 100 photos documenting each and every measurement taken. This is the only acceptable proof in court.
It's a lot of work. So yes looking at this report doubtful he is an NWFA Inspector.