I have absolutely no idea, but I imagine most medicals follow a very similar pattern. However Fer had some problems a couple of years back with medicals and his knees. Obviously £8-£10 million is a big investment.
Fer never 'failed' a medical at Everton and didn't really have that much wrong with his knee.
Everton tried to be a bit sneaky and claimed that a previous injury Fer sustained meant they wanted to restructure an agreed deal into being based on the amount of games Fer played for them.
There is a wonderfully angry interview from Fer on YouTube (in Dutch unfortunately) where he is rather uncomplimentary about Everton and how they had damaged his career by making such false claims. He said he was very upset he couldn't play against them in Norwich's opening game last season as well, as he needed to right some wrongs.
I imagine the Fer deal will be announced sometime today, he only had the medical yesterday and everything can't be finalised quite so quickly.