The integer section is, by far, the most extensive section. Having started at 2.5, you can see from below that most of the questions are integers.

Number Sense: Integers 3.56 97 % ( 757 / 780 )
Number Sense: Decimals and Fractions 3.60 93 % ( 123 / 131 )
Geometry 3.56 85 % ( 188 / 221 )
Logic and Reasoning 3.56 91 % ( 157 / 172 )
Measurement 3.60 91 % ( 144 / 157 )
Data/Statistics/Probability 3.63 92 % ( 94 / 102 )

If you think it is too slow, it probably is for your DD and your placement isn't accurate. For my DS, he hasn't had that much exposure to the 3.5 integer questions and, even though he is getting them correct, he needs the practice. So, I'm not too concerned that it's moving slowing.

By the way, the 2nd grade accelerated much faster. I wonder do they have more questions with every grade level.