Having had seen it myself, I can confirm it was a full runway length takeoff.
At MDE intersection takeoffs are not that common, Avianca used to make them a lot (from Bravo) when they had the Fokker 50s, but now they're seldom seen (still happen from time to time though).
What is more common is a runway 19 takeoff rather than the usual 01, Tampa Cargo does it a lot since runway 19 threshold is right by the cargo terminal so they save the taxi fuel, and from runway 19 there's a slight down slope, helping performance (perhaps something the DC-8 crew could have done). Iberia likes runway 19 as well.