Been here 8 years and never been robbed, or even had it attempted. I have broken up one incident that looked like a robbery (woman being accosted by three callejeros in Plaza San Martin, grabbing at her large purse and yelling at her, while others stood on and watched) and just a few days ago another incident that could have been a young lady being accosted or robbed by callejeros (weren't cartoneros) that were right in front of my building going through the trash at about 2:00 am. There was a lady that was robbed on our street a week or so ago - she was yelling at the top of her head that she'd been robbed, I was in the dining room and looked out the balcony and saw a callejero running down the street toward the cemetery with a purse swinging in the wind.
We now have a full time police presence on our corner, don't know how long that will last.
Every member of my family (extended as well) has been robbed multiple times, in other places, but nothing recent. Nothing in the last couple of weeks even.
Edit: Almost forgot (I wasn't there, but good trustworthy friends were): About a week or so ago, maybe 10 days, my friends were sitting at Exedra (corner of Carlos Peligrini and Cordoba in Micro Centre) late afternoon and witnessed an attempted robbery of an older gentleman sitting at Exedra near the corner. A guy came running up and grabbed the man while he was sitting at the table, by the neck, forcing him to stand. He had waited until the traffic was stopped. he was trying to get the gentleman's watch off his wrist and struggling with the guy. The struggle actually took the two into the street. The other gentleman with whom the target was sitting got up and joined in the struggle. A second guy came up and tried to help the thief. by this time they were in the middle of Cordoba crosswalk and a motorcycle came up and the guy who came to help the original thief jumped on and the bike sped off. this left the original thief who, once he saw that his compatriots had abandoned him, looked around (presumably for another accomplice who was to take him away) and seeing no one coming to his rescue, let the target go and sped off across the street and into the crowds.
That was a pretty big one - middle of the day with a lot of people all around. Kind of surprised everyone...