I guess you could say that. For better or for worse (the former in your case), Planet Terror is an "old school" Grindhouse film which follows the rules of the book. Tarantino, characteristically, subverts them in Death Proof by "introducing" an element which happens to be his forte: dialogue. And by doing so, I think he not only stamps the film but the genre itself with his name, something he also accomplished with the two films earlier this decade.