This is standard advice for the DL flight. However, I've always had lots of time at EZE, with basically no line for SkyPriority DL check in (go to the far left as you enter the departures C terminal) and no limes for passport control, although I have seen minimal lines for airport security. (Arrival at EZE can involve long lines for immigration as a foreigner and then again (even worse at times) for customs to X-ray all inbound bags. The AR lounge is very close to the gate DL uses, although there's a slightly better AmEx Centurion lounge (for regular Plat charge card members, although Centuions are sent to a special inner sanctum with food served from a menu and good French champagne) just across from the AR lounge on the mezzanine level and accessed by the same stairs or elevator.