#1
So I am having issues with getting a good triplet sound with my practice. When practicing 3 note per string scales and I start getting up around 100 bpm, my notes start to sound less triplet sounding. Like all 3 notes are of equal distance in time between the metronome beat. but when I listen to songs like Colorado Bulldog, the 3 note per string beginning or even the run before the 1st verse sounds very triplet sounding and when I do it, it does not have that same sound. Does that make sense? Has anyone experienced this? Any ideas on how to get the triplet sound in the run more like Paul Gilbert.
#2
Try getting a tablature program like guitar pro, you can download a free demo, and make a triplet track that you want to practice and put it on repeat. that should help you get the 'feeling' of what triplets sound like. Make a drum track with it to act as a metronome.

I think I know what you mean though where triplets blend the line between a 3/4 signature of 8th notes. You can try accenting the note (like this... BA-da-da BA-da-da... if that makes sense).
#3
If they're ending up with less of a triplet sound and more of an 8th-8th-quarter kind of sound, it probably has to to with how smoothly you're moving to the next string. Not from a pick-hand perspective though. More like how ready your first and second fingers on your fretting hand are to go to the next string. I know I tend to rush through the triplet to make sure I get all the notes in and then end up not having my fingers ready to get to the next string.