You're right to point that out. I abused the term. The real thing I think ggplot and protovis/d3 share, and the fundamental thing that makes them powerful and i

You're right to point that out. I abused the term. The real thing I think ggplot and protovis/d3 share, and the fundamental thing that makes them powerful and interesting, is the declarative nature of those DSLs. GoG is quite a bit more on top of declarative syntax, but, while I really enjoy Hadley's work, I don't think it's the end all be all in declarative graphing DSLs.