Yes they are. You can see them on the Supergo website as Shimano ST-R600 Short Reach STI .

Description
At last! Shorter, adjustable reach STI levers for smaller hands! By inserting or removing the included wedges, the R600 levers can be adjusted closer to the bar - this becomes especially important with ergo-bend bars! Compatible with all 18-spd and 27-spd Shimano drivetrains.

They're a little pricy for what you get. They're only $50-60 less than Dura Ace shifters. But, if it makes a difference, it's probably worth the price. I'm new to biking so I don't know if I just need to get comfortable with my biking skills or if the short reach levers will fix everything so I'm just going to wait awhile before making that decision.