SLC vs GRD data availability

Does anybody know whether SLC and GRD products are ready for downloading after the same amount of time? So far I have only processed SLC products and for the purposes of the project the data had to be made available to the client as quickly as possible. In the case of SLC data, the data was available 1-3 hours after the image was captured, which is what it says on the official website. I would additionally like to include GRD data in the process, but I have not found anywhere confirmation whether this data is available as quickly.