I've got a few comments on my story which suggest that the build up was too slow. I've tried to change this in the new stories I'm working on but I find that I am dissatisfied with the story when it does not have an adequate build up. I suppose I am one of those writers/readers who likes how the action unfolds almost as much as, if not more than, the action itself. I considered adding the slow tag myself but I felt it may serve as a turn off to some readers and the action scenes are fairly fast paced. I have to say I'm still unsure of whether this tag applies to me or not after reading the comments here.