The OP asked if it is Reliable to Use Without Question. I just pointed out one example of the number given as being repeated without the correct additional (important) information. Besides, most casual users often neglect obvious potential variables in their process, stuff like is the thermometer precise? (are you sure? By calibrating with a known standard such as a Kodak Process thermometer?) Is the developer temp shifting during processing? Perhaps processing at .65 vs .56 is not a big deal but to some careful workers it matters beyond getting merely Decent Printable Negs.
And As I Said, hey its your film. If you trust that site without question that's your biz. I don't.