mingwan0, I am only repeating the claims made in the latest PR. If they run counter to DNAP's previously published claims then I am not the one you need to take issue with.
The PR specifically points out the ability of the product to determine the contribution of a single great grandparent. (Something not previously possible.)
I don't know about you but I, and all of my associates, have a 'set' of eight great grandparents. Each of them contributing 12.5% of my ancestral heritage.
If previously released products could not determine the contribution of a 'single' great grandparent, then the 3% accuracy claim seems to be a little optimistic, don't you think?
regards,
frog