I can attest at least that my own entry is accurately represented and I have not been in contact with any other developer who has expressed that they have not been able to add their own entry or that luke-jr or Theymos have otherwise misrepresented their entries.
Have you heard from anyone having such difficulties listing their opinion that this is not a good source for developer sentiment on fork proposals?
edit: At the very least, it likely suffices for the purpose which I suggested, which is to cross reference blockstream employees and non-blockstream employees?