At the time I grew up into collecting comics, DC was kind of uncoolat least here in Germany, but I was wondering if the original Detective Stories were, well, more about Batman being a detective?
I didn't start collecting until the 80's so by that time Batman was pretty much superhero all the way, but from what I understand some of the early work by Bob Kane did emphasize his detective work a little more. I think we also have to recognize how much of this is affected by technology and it's rapid growth. Today a lot of Batman's "detective work" is done by computer and not the old fashioned way.