Hi Dynamite - welcome to Pherotalk. 
Yes, this is broadly what you might expect with TUTH.
Older women do tend to be sensitive to, comfortable with and responsive to a higher/more overt none signature.
Younger women are generally less responsive/put-off by high/overt none but on the occasions you find one who is, responses can be strong and almost unconscious.
Yup, TUTH is primarilly designed to enhance sexual encounters.
Yup - some like it, some don’t, also the level of sensitivity to the scent of the mones themselves can vary wildly.
At 25, TUTH was probably not your best choice for a general attractant TBH - It is best used with established partners or when you are very close to the bedroom. Something like Ammo and IS or IO might have been a better more well-rounded choice for someone your age. The socials are equally important for creating all-round feelings of attraction in younger women.
Have a read of this thread for all the basics on choosing and using pheros effectively.