I get about 75 minutes of flying time from a 600 mAh NiCd pack with about 40% capacity left in the pack at the end of the day. This is on a 5 servo 40-sized sport plane using standard servos (not digital). For me this is 5 flights. I tend to have long flights. Some at my field keep their flights much shorter, so I guess I could see someone claiming 10 flights with a conservative reserve.

The reasons I like NiCd are because it is very mature and very reliable technology. I believe NiCd is more reliable than NiMH and LiPO. I want to fly, not mess around with batteries, but I can certainly understand how someone would feel differently.