I was at Disney all this past weekend, and several times during my visit across all 4 main parks I had cast members comment on whatever Pony stuff I had with me that day. The most notable was a Woman at Animal Kingdom in front of the main entrances where you swipe your MagicBand/Pass/Whatever, She noticed my MLP shirt and asked where I got it, Then told me how much she loved Ponies and that she was a collector.
I've also gotten other comments on my wallet and phone when I've been there other times recently, but It's so cool that there are so many Collector's and Fans throughout Disney Parks.