You'll note that the completion percentage WAS based on those first 7 weeks - the stats you provided. (I.e., I just divided & changed it to a percentage.)
I'll continue - I figured out how you did 7 games (manually.)
First 7 games
RG3: 1601 yards passing, 7 passing TDs. Overall quarterback rating: 101.8. He's currently ranked #3 among quarterbacks by rating. He's 18th in the NFL for rushing yardage. 18th! Newton is 31st, Vick is 42nd; they're the only QBs in the top 50) 6 rushing touchdowns, 468 total yards rushing. Total yards passing is 1601. That's over 2000 yards on offense. 3 interceptions, 1 fumble
Manning: 6 rushing attempts, 33 yards, 0 rushing TDs. Total passing yards = 1595. I'm not sure how to figure out his quarterback rating for the first 7 games, but his ratings per game were: 58.6, 51,1, 39.3, 63.2, 66.8, 62.6, and 117.5. 9 passing TDs. 14 interceptions
Someone else can get out a calculator to add these yards up for Montana or Vick.
To recap: Sure, we can call him a running quarterback. Yet, compared to Manning's first 7 games, RG3 has STILL managed to pass for more yards. He's run for more yards than any other quarterback in the NFL this year. He's had more rushing touchdowns than any other quarterback in the NFL this year. You say it as if it's a negative thing. He's 5th in the NFL (of all players) for rushing touchdowns. For what it's worth, Morris, the 'Skins RB, is tied for 6th in the NFL this year for running TDs, so it's not as if he's really taking them away from his teammates. He's 10th in the NFL for total yards this year; 1.3 yards per game behind Luck. (9 total yards behind Luck)