It doesn't matter how much 'debris' has been spotted if it's not MH370 its just debris.
25 days into AF447 SAR recovered 50 bodies and 640 items of actual debris.
Air France Flight 447 - Wikipedia, the free encyclopedia
Even the ethiopian hijack proves some debris should be prevalent on low impact or hi impact (AF447/Swiss 111)
20 days so far with Zero results. And this is in no way detriment to the brave expert men and women involved in this search.
I hope they have their coordinates right.