The biggest coho I've gotten to my boat (had to be released as it was a wild) was on a jig while halibut fishing.
I was reeling in a dogfish or something and TWO upper teens coho chased my gear RIGHT to the boat. Literally a foot or two under water before they both turn away. WELL I happened to have a rod sitting right there with a jig on it. I dropped the jig in quickly and BOTH fish turned. The first one came by and tried to hit the jig but missed. The second fish was coming in but before he could get it the first fish turned on a dime and grabbed it!
Very exciting to see all that happen right on the surface and right beside the boat! (I just dropped the lure straight down I didn't cast out) Unforunatly it was a pittiful battle the fish didn't really fight just spun around for a bit then I released it. Sometimes coho can be so lame.
Anyways the whole point of this story is yes jigs work. I've caught a handful jigging its fun to try something different from time to time. It's not as effective as trolling though because you don't cover much ground.