I've visited Greece and its islands dozens of times, I'm used to the food and how it's served, by that I mean hot dishes served warm. I prefer my cooked food hot but if I eat in a Greek restaurant I'm not surprised if the food arrives tepid.
But for anyone who hasn't eaten Greek food in Greece warm food can give the impression that it hasn't been thoroughly cooked. Every time I visited the Taverna I played a little game where I'd try to guess which diners would send their food back to be re-heated, it was about 20 percent. Despite its cold food the atmosphere was always warm and friendly. I'm very sorry to see an independent restaurant close.