Radar track released by the Turkish MOD (linked from CBS News):
And a link to the same area on Google Maps:
https://www.google.co.uk/maps/place/...d9dbd42a625f2a
Note the scale on the Google version. Looks to me as if the Russian jet would have been in Turkish airspace for no more than 15 seconds or so. The little isthmus of Turkey is so narrow that the moment the Russian jet enters it, you could quite reasonably say that it's exiting it! Who am I to judge, but it looks like a bit of an overreaction.