I wouldn't count on anything at JFK being fast (although several years ago, right after they stepped up security screenings AGAIN, I was pleasantly surprised by how fast I got through, allowing me to get a foot massage in the Jet Blue terminal before my cross-country flight...).
7:30 AM certainly ups your chances, but... yeah, I dunno. When I lived in NYC we lived fairly close to JFK so generally flew out from there when possible & it was generally tedious & time-consuming (I wouldn't say moreso than any other large airport necessarily but that's not saying much). Especially if you have to change terminals, b/c the airport is pretty large.
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7:30 AM certainly ups your chances, but... yeah, I dunno. When I lived in NYC we lived fairly close to JFK so generally flew out from there when possible & it was generally tedious & time-consuming (I wouldn't say moreso than any other large airport necessarily but that's not saying much). Especially if you have to change terminals, b/c the airport is pretty large.