I'd like to know what ride is ten minutes long too, I wouldn't mind waiting 2 hours for that one. ;)
No, I don't think that lines are getting too long, it all depends on the ride. I don't believe there is a coaster yet built that SOMETIME during the season you can't get on with just a 10-15 minute wait. It all depends on the days you go, the weather, crowds, whether or not the coaster is new, if it has had downtime that day, if there are any events in the park that day, and so forth. So if you can plan out when to visit, the lines won't be long at all.
On the other hand, if you only have certain days that you can visit and cannot go at any other time, if the line is 2 hours are you just not going to ride, if you won't be coming back? Sure, you might not get as many laps in or go on as many rides, but you can still hit most large attractions, even on the busiest of days.
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Po!nt of View: A different look at Roller Coasters.
http://www.crosswinds.net/~justmayntz/thrills/