Anyway in regard to the ongoing discussion if true, if useful, if necesary or not, I beg to take the reports this time a bit "more" seriously than the other ones before, since this time - YES, so far only Russian reports - admit that the deal was signed, which is a bit more than "still under discussion". Agreed, it is not confirmed like we would like to, but I really can't think that the Russians will embarrass themselves simply by telling us in a few weeks: "upps, sorry guys ... that all was a false report !"
In general I agree with You that this deal is only fully confirmed if confirmed by a Chinese authoritive source ... but that could also be very late or even never since there's no need for the PLAAF to do so. Was the Il-78 purchase ever officially confirmed for example ??
Even more I beg You all to take into consideration that there might be reasons behind - if true - beyond our own thinkings. May these be simply political support, technology cooperation or transfer, ... I have the feeling that for some here this deal simply could not be since it isn't allowed to be. The J-11D, J-16 and other techological progess aside ...
Deino