Yes, it all depends on how early you get there and how busy they are. We had to wait about a hour and 15 minutes but they did have things to do inside the visitor center. Recommend watching the short films that are playing free of charge.
It probably varies a bit each day, but the tours are every 15 or 30 min, and when we arrived midmorning, we waited about half an hour or less. There's a small display in the visitors center that we looked at, and the wait wasn't bad at all.
Waited 10 mins. Went on a weekday at 10 am
We only waited 5 min.
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