There are several adult themed rides in the various Disney Parks, but I do tend to agree the marketing and overall additions have been catered towards children and younger children at that. I understand the big dollar will come from families and specifically those with kids, but I don't think it helps Disney shed it's image as a "little kids park" with how it's become lately.
This last May I was telling my girlfriend about Disney who hadn't been since she was kid - she didn't have a strong memory of it. She also had the response that it was a "kid's park" and there weren't alot of exciting rides. So I requested the DVD planner and popped it in. The first few lines narrated went something like, "Do you wish you could be a Princess or a Pirate?!" in a female voice clearly aimed at smaller children. Most of the DVD showed smaller children playing or interacting with characters, etc. This did not support my position that there were adult rides and activities.
I remember the "older days" of WDW marketing were geared towards the "thrills" of the scarier rides and had a broader spectrum of what Disney offered to all ages. Lately Disney seems to focused on a specific (younger) audience in their marketing, rides, and interactive queues. Don't get me wrong, I like the "kids rides" and all of the nuances about the parks, but it's a hard sell for those who aren't overly into Disney. I really wish they would add a few more adult oriented rides (ie: Tower of Terror, RNRC, TT, etc).