Yes, I used JKD in the street once. Well actually it was in a bar, but you know what I mean.
The JKD experience that I have is 2 days of Rapid Assault Tactics (RAT). It's a streamlined version of JKD, and it's very effective. This is the system that Paul Vunak created. Anyway, I was in a bar and a guy came in with an attitude, looking for trouble. He sat next to me and immediately began running his mouth. Then he threatened to punch me in the face. I got up, and told him to cool it, which only made him more confrontational. So I got into a basic stance, with my elbows up at face level (to prepare for a destruction) and dared him to do it. He did, throwing a big right hand punch. I closed my elbows as soon as I saw him move, and his fist bounced off of my elbow. It was amazing, when his fist hit me, it actually kept going for about an inch. It was just a split second from the time that he hit me to the time that it bounced off, but I could literally feel his hand "disintegrate". It was a powerful punch, but the blow felt soft, like his hand went "mushy". As soon as that happened, I zoned out a few feet, because he didn't wince in pain because of the damage to his hand, like I expected him to. If he did, I would have immedately followed with the straight blast, followed by HKE. Instead, I zoned out and kept my elbows up, ready for a left hand shot or attempted clinch, etc. Even though he didn't show any pain, it was obvious that the fight was over, as he just stood there with a look of bewilderment on his face. He was a lot bigger than me, and he didn't realize that he had punched my elbow, he thought he punched me in the face. He couldn't seem to figure out how he could hit me so hard that he broke his hand, but didn't even faze me, lol.
Anyway, several people got between us and he was escorted out (he went quietly), as he was psychologically defeated because his best weapon, the big right hand punch was taken away from him and he pretty much lost the will to fight after that.
Hope this helps