New to Nitrous...Need Some Pointers...!

The weather's been lousy but last night I had some more seat time since stepping down to the colder plugs. I noticed that the throttle doesn't respond nearly as quick as it did before with the other plugs. Also, I was running on just motor last night, no spray.

Did I lose some power stepping down to the colder plug? If so, what's the most I would have lost? Thanks.
 
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