Unsurprising, to me anyway
And again, remind me just exactly why and how anyone was surprised at all about what Snowden told them? This particular shit with the DEA has been common knowledge in Florida at least for as long as its been going on, they said they were going to do it even. It was a point of fucking pride for DEA, FDLE and the Governor's Office, the Coastal Sheriff's Offices, and the Coast Guard that the DEA could do this. They used to tell them all the time, at least once a month, they could hear them and then send one of the Helicopters from HITRON-1 in Jacksonville flying up and down the coasts to shoot out the engines on their boat a few minutes to an hour later.
And, now that I'm thinking about it, NSA used to have it very clearly stated on their website that they're explicitly authorized to collect on narcotics trafficking, they even had a link to the Executive Order authorizing it that Reagan issued back when we thought the drug war was winnable. Why anyone would think they wouldn't or weren't collecting when an agency that isn't known for their transparency in targeting were saying they were doing mass collection of communications related to narcotics trafficking is beyond me. I always thought it was stupid they were telling them so as well, but I guess they were trying to deter trafficking. Not like it worked or anything, it just moved overland to Mexico and was orders of magnitude easier for everyone involved except the cops and the spies.
Regardless of any of that, you'd be pretty hard pressed to find someone who lived in Florida the 80's and 90's possessing a modicum of intelligence and critical thinking ability who didn't strongly believe the DEA, FBI, CIA, NSA, SOUTHCOM via Army INSCOM through the 470th MI Brigade, HQDA G-2 and JSOC's Intelligence Support Activity, XVIII Airborne Corps, 1SFOD-D and 5th SF Group's S-2 offices, and the NSA's CENTRA SPIKE program, and whatever/whoever else was listening to every conversation to Latin America that originated from here. Only fools and idealists didn't, and I don't know many fools or idealists. People "knew" (and still think) they were being listened to if they were calling family in Colombia, Jamaica, Peru, the Bahamas, or Bolivia and it was a safe bet to assume the same for Mexico, way before the drug war went insane there. Its just how it is.
Then again, keep in mind that what most of my friends figure now and figured back then is that not only is the US Government listening, wherever they're calling is listening too and in the case of my Colombian, Venezuelan and Cuban friends that still have family or close friends in country at least, they're probably right.
I'd be willing to bet that they were also intercepting Key West and Puerto Rico at the same damned time and they're not fucking saying anything about it because its still ongoing/operational. I wouldn't be surprised in any way, the Federal Government acted like the Keys and Monroe County were a separate country quite a bit in the 80's, to the point where the people living on Key West had enough and they "seceded". Also whenever it suits the Feds they act like PR is foreign. When it suits them to act like its ours, they do instead. Sometimes in the same press conference.