My mother is a very accomplished cook. The 1987 built home which my folks bought new originally had a Decor solid surface cooktop, which Mom never liked. That was replaced about 10 years ago by a GE Profile gas cooktop. Mom had not had natural gas cooking anything since the mid 1960s, and she was thrilled to have this - still is.
Tom is absolutely correct though, especially when three or four burners are on simultaneously at a decent heat setting, which is often the case for my Mom on Sunday, the space around the cooktop can get exceptionally warm and uncomfortable, and the cooktop is on island style counter with no walls around it to block airflow. This was not the case with any of the electric cooktops we had before, not the Decor, the Jenn-Air in our last house, or the GE before that which we had in Denver. This is a summer only problem...I'm not sure I've heard her complain during winter time. The problem was such that my Dad took down the flourescent ceiling light fixture and installed a ceiling fan in the kitchen.
Some of this may have to do with east-coast humidity. Steam and heat discharge from cooking out west rapidly discharge into the dry air in the house. That is not so much the case here, so moisture laden heat hangs around our kitchens much more so and thus can make you uncomfortable enough to warrant a kitchen ceiling fan.
Gordon