Yes.
It may sound silly, but PCAC selling for more money then NCAC also sounds silly, yet that is the harsh reality of the coin market. Its not only the fact that the coins originated from NGC plastic, its that many believe CAC/CACG is actually a bit tighter now than they were in the past. If that were true, it would mean that the coins without the "L" might have been graded to a sticter standard then some of the crossovers. As @Coinbuf stated, this is an irrational knee-jerk reaction and its very early to be drawing conclusions. It's mostly speculation and hearsay, and will probably just take some time for things to shake out. Also, a coin with a legacy designation is no more likely to cross back to PCGS/NGC than any other coins that CACG grades, the fresh coins graded by CACG are just as likely to cross.
Some non cac coins actually are crossing at grade, albeit a very small percentage. Many others are being detailed and downgraded. They have very little tolerance for rub/friction, scratches, wipes, or any other surface issue you can think of. You could send in 10 random unstickered coins from both services and theres a decent chance that the majority come back deets for one reason or another. As time goes on, we can start to get a better feel but initially its been quite a shock to the market and subsequently some dealers have been rabbling.
Laura will still be pushing CACG through Legend Numismatics, though she has implored CACG to get on the ball with marketing and the registry. Evidently all of her top set collectors are still fixated on PCGS/CAC.