I've never seen an issue either. My home network is about as complex as it gets with N, G, WDS network with 3 nodes. I've traveled with it and used it in various hotels. I've used my jailbreak iPhone as a WiFi hotspot, etc, etc.
I'm not saying others don't have issues, but I don't understand why I haven't seen a single glitch anywhere with mine if it's so prevalent.
I have zero problems at home when using wifi. However, when I use wifi outside of the home, it's painful at times. Same iPad, different routers, different results. I recently spent a week in New Orleans in a hotel with free wifi and it was so bad, despite a strong signal, that I ended up turning off wife and using 3G for most of the trip. The problem is real.