The example set in this book about a girl who has a severe (not a mild) concussion is disturbing. If you have had a concussion which was accompanied by a loss of consciousness, vomiting, severe headache, aversion to lights, loss of balance and ringing in the ears - resulting in hospitalization, it is not mild. To even suggest that it is okay to go back to skating a week later, just because you have a big competition coming up is reckless and foolhardy. With a concussion like that, a skater should be off the ice for a minimum of a month. No reputable neurologist would ever sign off on a skater returning to the ice within days.
The United States Figure Skating Association has a concussion policy and recently finished a three part series on concussions (available on their website) which should be required reading for all skaters, their families and coaches. You only get one brain.