If the license says, Extra, you're an Extra. Testing procedures changed over the years. For my General exam, I had to draw schematics and copy random code at the FCC office. For Advanced, I don't remember drawing schematics. For Extra, no schematics, but the code had was easier - still 20 WPM, but a sample QSO, with 10 questions, and credit for 1 minute solid copy. I got both. Tried for the ARRL over the air code proficiency certificate, the highest I got was 15 WPM. I always work CW SS, note that most of the calls in the log are extra class calls. Regardless of when you passed the test, if you're in the CW SS, that's as 'Extra' as it gets! You're also really cool if you teach classes, Elmer new hams, serve as a club officer (though there are a lot of Tech licensees doing fantastic jobs for local clubs, including repeater maintenance, who just don't 'do' code yet. Give the hobby your best, whatever your license class!
My progression - Novice, Tech in !957, General 1958, Advanced 1969, Extra 1980. You can do it in one session now, have been for a good while. When I was living in Tucson in the 1970's, we had an Extra class show up on the repeater, new call sign - everyone asked him what his previous callsign was - totally floored us that he HAD no previous callsign. More power to him - we were glad to have a newcomer with smarts!(If he's reading this, I was W7HSS back then, and it was the K7CC repeater, 34/94)
73 to all, and see you on the air!
Fred Wagner, KQ6Q