I have a hard time letting go of the idea that the older definition of a (true) point guard isn't needed to win in college. In the NBA 100% you don't because of the skill level of 6'9 guys dictating the offense. However in college of the top 10 teams today below are the ones that I feel have a "True Point Guard".
1. Purdue- Braden Smith 10 PPG, 5 boards, 4 assists, has 50/40/90 shooting splits and 2/1 A/TO ratio and is 6'0 on a good day. Dictates their entire offense, getting guys the ball in spots that set them up for success and scores when he the team needs. Gritty player, the rest of Purdue mirrors his demeanor.
5. Kansas State- Marquis Nowell, 17, 3, 8, has 42/37/88 shooting splits with a 2.5/1 A/TO ratio. Plays fast, aggressive, and efficient and team follows suit.
7. Virginia- Kihei Clark 11.6 PPG, 2.7 Boards, and 5.8 assists, has 43/ 40/ 75 shooting splits and a 2.5/1 A/TO ratio and is 5'10 on a good day. Has crazy ball pressure, likes taking the last shot and knows how to get guys in the right spots
8. UCLA- Tyger Campbell 14 PPG, 2.5 boards, 4.5 assists, has 40/35/ 84shooting splits and a 2.5/1 A/TO ratio. 5'11 on a good day. Dictates pace, offense and ball handling
9. Kansas- Dajuan Harris (first person that came to mind when I saw this thread) 7.2 PPG, 2.3 boards, 6.5 assists, 45/42/77 shooting splits 3/1 A/TO ratio 6' makes winning plays. Led the Jayhawks to the title last year. Effects winning with deflections, hustle plays, etc.
I'd argue players that are slightly erratic, not efficient, and are selfish with shot selection and that play extremely fast and up and down the court IE (Kerr Krissa, Arizona, Zakai Zeigler Tenn ) don't fit the mold even if they may have similar or comparable stats to the players above. I was even slightly hesitant with Kihei Clark because he kind of is an in between.
So long story short 5/10 teams in the top 10 have what I'd define as a true point guard. 5/10 don't. The teams that don't Alabama, Houston, Tennessee, Texas, and Arizona have great coaches, systems, and talent at other positions that make up for the lack of a true point guard.
I'd also argue that depending on the team, players that could be true point guards take more of a scoring role because of the talent level surrounding them. Mike Smith of Michigan a few years back comes to mind. Was averaging 23, 5, and 5 at Columbia before grad transferring to Michigan and averaging 9, 3 , 5 and a 2/1 A/TO ratio filled the true pg role at Michigan perfectly when he was surrounded by improved talent.