No. \n is \x0A on Windows. (And $/ is \n, since the CRLF→LF conversion occurs before the buffer is searched for the IRS.)

>perl -e"print length qq{\n}
1
>perl -e"print qq{\n} eq qq{\x0A} ?1:0
1
>perl -e"print $/ eq qq{\x0A} ?1:0
1
>echo foo| perl -e"print length <>
4
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Maybe you're thinking of older Macs, where \n is \x0D.

Update: Added proof.