I just got finished with the very internship you are talking about.
Yes you get trained and signed off as a 135 SIC. No you are not typed in the King Air but you can log every minute of it under multi-trubine-SIC. Their opperation does require there be an SIC in the plane so it is legit even though the plane can legally be flown single pilot. You also do not sit right seat in a citation. They do not own a citation.

SO far there have been 5 interns that have gone through it. 4 are at regionals 1 is in a pool.

I walked in with about 275 TT and walked out with 650 TT. If my math is correct thats about 375 turbine SIC. It helped me get 3 interviews and an airline job. Like some have said Skywest as well as some others will not budge on their time though.

It is a great experience and you learn a ton about flying away from UND. even though they just got 3 new interns, call the guys in Fargo soon.

Exx