If it's just trivial citation of a codified stereotype, then the "stunt" or whatever is no longer so creative, eh? Unless your compilation has anticipated so many that nobody actually turns to page 20,000 to look up the rule.
Ok, I will try and give a short answer. This depends on the skill of the DM, the brevity of the rules, and the quality of the players. Better the DM, more willing and fair the players on using the new rules in the sprite of the intent. Out of all of the DMs I have played with (including me as one of the DMs, only two have and the skill and imagination to do it right and one stoped because of player attempted abuse after the second usage in 3 months.
Right now, I am running all of the playtest games. This is, admittedly, a weak point in the playtesting process, but one I am working to overcome. In fact, I am working up a playtest module with pregen characters.
Hussar, you have exhibited an interest in trying new games (you have a thread to that effect). I would encourage both you and Garmorn to participate in (run) the playtest module when finished (January due to holidays).
RC
While I love to test new games. (I have lost track of all of the games I have played) I currently don't have a group and am out of practice. (Had a 3 year period of no table top RPG). Your awarness of the need to spread out play test means I will be looking foward to how it works for other DM's. I think that is the key. Several times I have seen what at first glance to be great rule die a slow death because the require a special type of DM.
Garmorn, just to add to your list of different sources for different experiences, I think a big one is how often did they play modules. Honestly, I think that has been the source of much of the difference that I've seen between my experiences and others.
Right, modules - I am not sure they are a cause or effect or both of the 'problem'.
One thing I forgot is that many groups don't see the lack of improvization (a better term then creativity) as a lack in their games.
Some groups poor all of the creativity into their background and role playing. Example one DM required a 2 page background that covered your family, how you got trained and why you where involved. She used that to creat a detailed campaign the got the players and their characters involed in the every affairs of the world. Combat was strickly by the book.
On the other hand I have been in far to many campaign where combat by the book was the start, middle and end of the campaign.