I certainly hope that you would consider Phillip R. Johnson to be an acceptable source regarding hyper-Calvinism.
Based on what Phillip Johnson writes, it would be very fair to say that Edwin Palmer was a hyper-Calvinist.
In practical terms, the hyper-Calvinist "gospel" often reduces to the message that God simply and single-mindedly hates those whom He has chosen to damn, and there is nothing whatsoever they can do about it.
Don't tell me this isn't exactly what some of the Calvinists here at FR claim, especially Jean Chauvin, and CC Woody.