The term "Wing Cracks" is incorrect, as it implies a far more dangerous condition than it really is. It evokes a picture of cracks all over the wing, with bits falling off.
See Tech Log for some facts.
The Times today described the cracks as being in the roots of certain brackets where they are attached to the wing structure, internally, and while unrectified these cracks could eventually affect the wing integrity, they do not at the moment.
And that seems to me to be about right, judging from what the experts in Tech Log say, although you need to sort them from the BS merchants. But I am not an expert in composite structures.
Problem is, so few of us are, including most of the LAME community.