Wow, thank you. First for not telling me I'm crazy, and second for your wealth of information.

"you can finish a meaningful session in 15-20 minutes" That's very useful. I'm staring down the fall's schedule with fear. It's also useful to read that the programs are equivalent. Does AAS only use the tiles or does it ever put a pencil in the child's hand? In our case, I strongly suspect that making the transfer to forming the words by hand & typing will also be required for transferability.

"On placement: I started from the beginning" gotcha, thanks. AAS makes that about $250 more palatable than Barton.

"do you remember if he had multiple CTOPP subtests, and if so, how he did?"
CTOPP:

Phonologial Awareness Composite Standard Score 103
Elison 11
Blending Words 10
Phonological Memory Composite Standard Score 118
Memory for Digits 12
Nonword Repetition 14
Rapid Naming Composite Standard Score 112
Rapid Digit Naming 12
Rapid Letter Naming 12

Whoops. I misrepresented his scores in my OP. Blending words puts his lowest score at 50th percentile, so 2 sigma below VCI.

Is Phoneme Reversal the names of the subtest in the CTOPP? I'm planning to ask for a retest of the CTOPP and a TOWL. I can specify this if it's something that comes with the standard CTOPP as the district would purchase it.