Yes but we do not have samples. For example first Karachanak found 1.2 % G2a in 126 Bulgarians and then in her new research with good sample of 808 she found 4.8 %. The problem with research on Balkan is that it is not enough, bellow 100 is a joke, bellow 500 is not a good picture .
On Albanians there is one sample of 106 people but they only checked for E1b1b , one sample of 64 people(not enough), one sample of 55 people(not enough), one sample of 30 people(not enough) one sample of 114(the best so far, yet too little) and one sample of 51(not enough). When we combine them(without) the E sample it is 314 and this is kinda good, but then they did not really checked for subgroups in all of this samples and we can not be sure if some of the people are not the same.
There is a big sample on Persians and there is also data for other people out of 55 tested Albanians 3.64 are JM67, 1. 82 are J2-M92, so if this is the same sample of 55 Albanians of
Batagglia 2008, which finds 20% of J2 in Albanians, this will mean that 5.46% are J2a(but we do not know about other subtype of J2a) and the rest are J2b2