Pretty rare to be able to pick up all those skills in one year, even if they have been uptraining, but there's always an exception to the rule. For example, Daiane dos Santos started gymnastics at age 12 and won gold at Worlds at age 20, also getting the piked double Arabian named after her. Some kids just pick stuff up...there was a girl on my team who was able to do pretty much all the Level 5 and some Level 6/7 skills within a year after starting gymnastics.
But it's also hard to tell from summer training what skills will be going in for competition season. For example, a lot of girls work their first flipping vault into the pit/onto soft mats for a whole season before actually competing it. Or (for example) you will see a kid who has a BWO-BHS on beam but the rest of their events put them solidly at L5.
Everybody - parents, gymnasts, sometimes coaches - get excited when someone on the team starts training a new skill but there's a lot of work between making a skill and having it competition-ready. I think the amount of time and work between making a skill for the first time and being able to do it consistently, under pressure, without much warm-up is probably a big factor that separates athletes who advance through the levels quickly.
But it's also hard to tell from summer training what skills will be going in for competition season. For example, a lot of girls work their first flipping vault into the pit/onto soft mats for a whole season before actually competing it. Or (for example) you will see a kid who has a BWO-BHS on beam but the rest of their events put them solidly at L5.
Everybody - parents, gymnasts, sometimes coaches - get excited when someone on the team starts training a new skill but there's a lot of work between making a skill and having it competition-ready. I think the amount of time and work between making a skill for the first time and being able to do it consistently, under pressure, without much warm-up is probably a big factor that separates athletes who advance through the levels quickly.