well.... as it turns out, this is apparently pretty normal for at least some of the spyder models. i've had feedback now and have researched this on the internet. the only product addressing it at this time that i know of is the 'pedal commander'. its about $300 and intercepts the throttle POT voltage and alters it. it has tons of settings to choose from. i dont like it because of the cost, the number of settings you must work through, and that the control unit is not removable. it has to stay inline somewhere on the bike and in my opinion is ugly to have hanging out there all the time. for me, i would find the setting i want and forget about it. it does allow you to change settings through your smartphone with their app installed.
there seem to be other manufacturers considering adapting their similar devices to the can-am also. i contacted 2 of them, 'roar pedal' and 'sprint booster'.
RP is much less expensive, but isnt making it yet for the spyders. they asked me to gather some voltage readings off of my throttle and send as picture of the connector, to get a discount. i declined. the discount wasnt nearly enough for the work involved and their device seemed the most complicated.
SB makes the product i would actually buy. it had won the SEMA award for best new electronic product back a few years ago. it costs about the same as the pedal commander, but is far less complicated and the controller is removable after you choose a setting. my kind of device! unfortunately, they are made for many, many cars and trucks only. they have a list of motorcycles and the can-am is now on their list. but they sound overwhelmed at adding new vehicles for their device and in no rush to do so....
if anyone knows of others improving the throttle response, please let me know.