As a very early competitor and later helping the kids to compete.
Here is what I can say.
I would call it coastal and inshore.
About 30 years ago they chose to make it a "wide audience" event, so no more hard-core offshore legs.
Because of this, some crews are so-so and under pressure from CG and such organizations, this put paid to long tough races and/or heavy-weather sailing.
Therefore, there is room for sailing the EDHEC in many different ways from "fun-sailing" to hard core racing which you may find in some of the OD classes.
This may be even more true in Brest which offers the choice of sheltered or non-sheltered courses.
One thing you must also know is that this is as much a fun event as a sailing-race, schools and universities entering more people in the "shore" events - which can (do) quickly turn into wild "spring break" style

- than in the sailing event.
A number of entrants also have "rotary" crews, if only to cover for the "out-of-order" crew-member on any morning.
I am sure you have looked at the race website but here it is:
http://www.ccedhec.com/The vids tell it all I think:
http://www.youtube.c...player_embeddedhttp://www.youtube.c...h?v=PZvnVY2_L6s ;
http://www.youtube.c...h?v=R4TJEcgNAyA ; much more on you-tube.
PS: while each school-uni has its own approach to the event and targets to be met, the usual way is to tell your mum (and/or sponsors) you are going racing and look forward to different fun

(unless mum and/or dad have taken part in their youth)