Lozzer - just ot giver a different point of view, I think I ouwld be rleaxed too. But maybe it is becasue in Scoltand we don't have a "reception" year, so therefore don't have a list of words that they are "supposed" to know.
Here, the kids start school at the youngest at 4.5 - and can, if you felt it best, be held back until the following year.(They would then be the oldest in their year, unlike in England, where if you hold off putting him in school until they are 5, it seems they are just put into the year they would have been in the first place, which to me is just plain daft: they are still the youngest in their year and they are now behind the others! ).
Kids may are may not attend nursery beforehand (like England, we get 12.5 hours "free" sessions), so they may or may not recognise words when they start. The school sees it as its job to teach them to tead: they do not asume that they already can.
Ds (who started school in August, just beofre his 5th birthday) is only now getting sheets of words home that we are supposed to spend 5 minutes going through with him.
Far better to do what you are already doing, which is making reading fun and exposing him to books - soem with picutres, some without - as part of everyday life.
I might do a wee bit more of the Jolly Phonics stuff - but I know with ds, even doing the words he is doing now (at 5.5), that it reduces his enjoyment of reading as he is still trying to recongise the whole word and not learning how to put letters together.