Just like people there are strong and weak shrimp and some people survive things that others would not. I can't imagine that using dish soap followed by 5 minutes of rinsing would leave any sort of residue that would harm the shrimp. I use dish soap all the time to clean tanks/equipment and don't go to those lengths rinsing and I've never had any problems.
I rescaped my 20L just the other day and lost 2 yellow shrimp and a sunkist, everything else was perfectly happy the entire time. I don't know if it was the stress of being moved around or what, but it seems to happen sometimes. (And before someone suggests that I didn't rinse well either, the container they were in had never been exposed to soap or anything else shrimp-unfriendly at all.)