The Cards lost. He hasn't beaten anyone.
His level of play is substantially worse than Dak Prescott and DeShaun Watson in their first appearances. There are a lot of empty calories in those yardage totals. Kyler is 21st in DYAR and 20th in QBR.
Dak's first two games
25-45 227 yards 0 tds/ 12 yards rushing
22-32 292 yards 0 tds/ 6 yards 1 td
Watson's first 2 games
(started the 2nd half of game 1)
12-23 102 yards 1td 1 int/ 16 yards rushing
15-24 125 yards/ 67 yards rushing 1 td run
Kyler's first 2 games
29-54 308 yards 2tds 1 int/ 13 yards rushing
25-40 349 yards 0 tds/ 4 yards rushing
I do NOT expect Kyler to finish with the high level efficiency Dak and Watson finished with though. They had some all time great QBR's for rookie seasons. However, in terms of initial appearances Kyler is not far and in fact exceeds them. I still don't expect Kyler to finish top 10 in QBR this year.
To be fair
Houston was picking in the 20s and traded up for Watson.
Dallas was 3-1 with Romo in 2015, he got injured and finished 4-12. Added Zeke to a team with legit playoff aspirations.
Kyler went to the worst team in football last year.
I'd be curious what his QBR is if you remove the 1st 3 Qrts. Kliff totally wasting preseason reps to get ready has hurt the team (I'd argue it has hurt the redzone opportunities as well). Romo getting hurt in preseason allowed for Dallas/Dak to really use him to get 1st team reps in
I don't expect the level of efficiency as Watson or Dak because they have better teams when its all said and done.