You have already received some excellent advice. I would recommend reading over a three-week period. Cut the dose down in half the first week. The second week pick the low dose every other day. The third week take the same dose every third day and then stop. I'm assuming you will do this in consultation with your doctor.
Keep in mind that Prozac is different from the other medications you read about. Prozac stays in the body for a long time, and takes a month or two before any withdrawal would be noticed. Therefore, you won't see much information about Prozac withdrawal because if it happens it happens somewhere down the line, and would probably be misdiagnosed as a relapse, not withdrawal. Whereas, with all the other ssris, they have a very short half life, meaning they leave the body very quickly, in a matter of hours. It is believed this is one reason the body has such a hard time adapting to their absence, and withdrawal begins even before you're done tapering off them. Your psychiatrist is the person to discuss this with, but psychiatrists, including, I'm sure, Dr. Gould here, will tell you Prozac doesn't have the same withdrawal problems as other ssris. Whether that's true or not, again, your daughter wouldn't notice until a month or two has passed. Either way, titration with Prozac won't affect the body that much in the short run, so it can be done with much less immediate difficulty than, say, Paxil or Zoloft or Effexor.
The doctor here provides advice on tapering programs and medication(s).
Have you discussed this (your concerns and desire to discontinue your daughter's medication) with her doctor? You could potentially do more harm than good if her depression hasn't resolved. Has she had counseling to talk through the trauma?
The taper you mention does seem extremely conservative. Maybe a more structured taper would be appropriate?
I can understand your concerns but please don't let your fears affect your daughter. She may have doubts about herself and her ability to discontinue the med (or to function without it) so support her and encourage her and be patient with her. Perhaps everything you've already been doing. Just be careful.
J