I don't see disassociation. They've shared a great deal of their daughter, and their feelings of grief, helplessness, fear, regret, anger, and hope with the public for many months.
Maybe Gerry doesn't want to share more on his blog because he's seen the disgusting and filthy things that have been posted about him, his wife, his twins, his extended family, and most heartbreakingly - Madeleine - on web forums such as the 3Arguidos?
I'm sure he's seen it, don't see how he could miss it.
Maybe that's why he holds back.