In my opinion I'd say yes they do. Rabbit, like all other beings really, have feelings, so I do believe they do get attached. I know when I come in the room of my two babies, Bunbuns is always right there wanting to play or just a cuddle, and it's not because of food, she often still got stuff, she just wants to be close, and often it's followed by her licking my arm and hand for ages. I also have her laying under my desk most of the day, right on top of my feet, so I cant move (I work from home, so always in the room with them). Fluffy took a lot longer to adjust, I believe he got attached to his former home, but as he loves Bunbuns so much he is following her around all the time, therefore started to trust me a lot more. Now when I clean their stuff out, he's always next to me watching what I do, or when I sit on the sofa reading a book or so, he comes up to sit next to me. Furthermore, my partner who never feeds then, they always run over for a cuddle, and look out when they hear the voice, cause they know cuddles are coming. Looking at how they are, and how stroppy, especially Bunbuns gets when I don't spend as much time with her, I would say they do become attached.
With Fluffy, it was harder than with Bunbuns, as he already had a home before, but since he's not even a year yet... actually me may just have his birthday any day now, need to look at his papers... anyway, with him it took some time, but I do think if they feel loved, they love back. so harder probably yeah, but I do think they all do get attached. Just my opinion of course, but I think all beings are feeling, one whatever level, so I do think they feel, love and get attached.