No it didn't. There is a lot of processing between the read head and the DAC. The read head is an analogue process, and backscattered light might possibly slightly degrade the eye in the data slicer. But that would only potentially cause bit read errors, which will be addressed by the error detection and correction circuits. The data passed to the DAC is digital. If the ECC can't correct the bit errors, it would mute the sample. You'd notice such muting. Backscatter might possibly slightly degrade the servo tracking loops, but the process by which data is passed to the DAC is driven from the DAC end (and the CD drive locks the read servo to that clock). There's a FIFO buffer in the way to sort out read speed variations due to servo 'wobble' that might be caused by backscatter, as well as the deinterleaving buffer. Again, if the servo loops are so badly affected that the buffering is inadequate, you'd notice it.
And, when I say 'notice it', i'm not talking 'a more airy feel'; I'm talking gaps, pops & stuttering.
Backscatter will not 'confuse the d/a'.