you get better reception when you are with remote cause all the metal part counts as antena. I live in Costa Rica, use the USA setting, and live on a fairly occupied place. Many people listen to radio (mostly salsa, reggea, dance music, etc.) so I get pretty good reception on what is classical, rock, jazz and those which have all types (imagine opeth and dream theater on a radio station). I imagine that the reception works better with the remote, but I'm really not sure, since my IHP-140 lives most of his life on my pocket, and my remote outside, and I use the radio times when I know there is something good (rare times), and I get great sound. So, bottom line is, radio sounds much better with remote than with no remote.
P.S. My reception varies a lot, a place may be really bad, move it 5 cms, you get the best reception in the world