Not totally clear yet, but it seems that way. From NPR just now: While Iran did not reject the plan outright, state TV said that Tehran was waiting for a
“„While Iran did not reject the plan outright, state TV said that Tehran was waiting for a response to its own proposal to buy nuclear fuel rather than ship low-enriched uranium to Russia for further enrichment. Iran has often used counterproposals as a way to draw out nuclear negotiations with the West.