tbh that's in mostly an exaggeration, specially among new gens who tend to do more quick lunchs and take-aways. Even though we have lunch significantly later than the european average (I'd even say closer to 2pm or even up to 3pm rather than 1pm), something that somewhat awkwardly here I agree it's excessive, I doubt anyone (unless they're exploiting the cultural-difference thing and somehow it's working) stays until 5pm lunchin' midweek. Perhaps it may only be applicable in the context of the weekend (when lots of gatherings at bars and tapa overdoses for who-knows-how much time happen), but overall for at least 5 out of 7 days a week that's an oversimplification.