major differences in ad position depending on physical location

[strumf007]

Hy,
I'm from Romania and I have noticed some major differences for the ad rank for one of my Adwords accounts. If I perform a search in City1(in Romania) I always see the ad on 1-2 positions. If someone performs the same search in City2 (in Romania also, but 500 km away from City1) always sees the ad in 4-6 positions. How can this happen? Could Google see a difference based on the physical location?

As far as I know, geo-targeting (at city level) is not available for Romania.

Regards,
strumf007

[strumf007]

I saw a past post(from jun 2007) about a similar behaviour ... and AdwordsAdviser said "Sometimes we run experiments that can cause some users to see different behavior from everyone else. In some cases individual serving behavior may be different due to the location of that user or other factors.". Could Google be testing geo-targeting for Romania?