Yep, I see where you are coming from mate. It is a little confusing.
Basically its trying to say that putting the seeds in a warmer place will make them sprout quicker. For instance if you followed put them in a cool, dark place it may take 5 days to crack the shells, whereas putting them in your airing cupboard where the temp is a little higher would only take 3 days etc.
I'll make sure it is changed for the updated version.