Hey, Jorel. You can do an offset in the MIDI track (lower right). Put in -4, or -10, or whatever to make the hits earlier. (Can't say the exact number without knowing what your clock settings are.) With a clock setting of 120 in Preferences, I would probably start with -3 or so and see how it sounds. If your clock is at the default (960 ticks per quarter), you might start with -20 or so and go up or down from there. Too early will sound worse than too late so be careful.

I am willing to bet you don't need much offset. I never offset RealGuitar unless I am using two instances, in which case I make one a few ticks early and one a few ticks late. NOTE: If you use two MIDI tracks, one for the chords and one for the keyswitches used for strumming, be sure to offset both the same amount. This definitely applies to RealGuitar, but I don't know about Ample since I don't have it yet.
By the way, most people on this forum know I am a huge RealGuitar (MusicLab) user and put it on pretty much every track I cut. Based on your post, I checked out Ample Guitar and it looks pretty cool. I may add that--not because I am unhappy with RealGuitar (which I love), but because it is always good to have different guitar sounds in the arsenal. That is the reason I bought Acoustic Legends HD which is great for solos but only fair for strumming.
EDIT: Whoa, I see that Ample has a Taylor version. OK, I'm sold.