Oh, perfectly real. There are plenty of places where you can stay as an athlete that has early warning when known testers are in town.
Certain parts of Florida for instance, they have people at the airports who whenever known testers are spotted arriving will make calls to training centres, gyms, and then there's quick ladder calls and within no time at all everyone knows they are in town.
(pretty much every major town that hosts a lot of athletes has some sort of warning system, for instance Girona is massively popular with cyclists.. as soon as testers turn up at one place, the calls go out to everybody in the town letting them know, Tenerife is another one.)
Its not just the weather that makes Florida such a popular spot for all kinds of athletes, from track to tennis players, to footballers.. (that and the sheer wealth of anti aging clinics).
Remember the Cyborg situation in Thailand where teh hotel caused a huge fuss and called the police.. Cyborg was tested just fine, but that wasnt for Cyborg's benefit. That was to let every athlete in the area know testers were in town.. if you are glowing, duck out and take a missed test.