Haha ok fair enough.
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For record, I only made threads about specific I2a2b coming from slavic invasion, not all I2* variants. While I2 *could* have come with the migrations of I2a2b, who really knows, we know that the original people of the Balkans as well as entire Europe were I people. I is the true haplogroup of the Europeans. There is a study that the ancient Thracians, before even neolithic invasions, had the same haplogroup as Sardinians who are a I2* something people.
im j2b2 specifically
I've never done the test, but I'm pretty sure I'd come as R1b-S28/U152.
According to this Sardinians are 42% haplogroup I (of which the majority is I2a1), the second most common haplogroup is R1b (22%) then G2a (15%). http://en.wikipedia.org/wiki/Sardinian_people#Y-DNA
The one found most commonly in the Balkans is I2a2b. Very close but still separated from the Sardinian one by about 10,000 years. Now when you go back to I2 (which is the ancestor of the I2a and I2b lines) we talk about something in the neighborhood of 40,000 years. That's how old my specific one is.
G2 came to Europe during the neolithic invasions, it shows highest concentration in southern Kavkaz. The only true haplogroup of the Europeans (the oldest to Europe) are the I haplogroups.
M269+ L23-
According to the thesis of Francalacci there is a low internal diversity among sequenced I2a1 samples from Sardinia and everything points at a bottlekneck that had happened relatively recent. I think that neolithic Sardinians could've been predominantly G2a and E with some token I2 from assimilated hunters-gatherers.