Im not saying they are more secure but something to bear in mind is you can drill a cylinder quite easily and open the door but if you drill a lever lock in the wrong place the door will still not open also you would then start having to drill all over the place to defeat it.Also some lever locks have small plastic shims in between the levers and picking can make these deform and stop the lock from opening as they get jammed up. A cylinder is easy to identify as its there in front of you so you know how to go about tackling it but a lever lock isnt, you have to identify through what you can see through the keyhole.Also drilling a cylinder can be done without damaging the door.
Im not doubting your ability as i said before just saying they can be a challenge.
Beer anyone.... ?