I don't think there's a big "leap", except of course on vault.
Allow me to disagree on this. Since the requirements changed about 6 years ago, the L4 skills have been watered down by a ton. That in turn left a huge gap between L4 and L5. Just to add, vault is not the whole story...
On bars: 2 kips, squat on, jump to high bars, tap swings and so on. ...and no break during the routine
On beam: longer routine, split jump, cartwheel, turns, dismount hold, etc.
Floor: longer routine, back-extention roll, FHS, straddle jump, dive roll (this is not give-away for a little one), RO-HS-HS, etc.
The reason it came easier to you may be because you were older in age and you had probably been purposely uptrained with all the L5 skills the whole time. Due to strength and maturity, older kids tend to zip right through these levels.