I live a few blocks from there, and havent noticed any blackouts over there- of course, its so hot, I havent been walking around that much. Usually blackouts in that neighborhood are pretty localized, and pretty brief- the other day, half a block on Santa Fe was out, including Gabarino, which, of course, had its own generator- but everything was back online within 2 or 3 hours.
A couple of nights ago, there were sporadic blackouts up and down Scalabrini- Sarkis was out- but they, too had a generator, and never stopped serving, and everything was fine by morning.
I wouldnt get too worried. Juncal y Bustamante is close enough to where the powers that be all live that any power outages will be short.