Blind tests comparing lossless against what codec at what bitrate? How many runs and how often were you able to correctly identify lossless?
My comparisons were made several years ago using LAME 320 CBR, LAME VBR, OGG, lossless (WAV) 16bit 44.1kHz and lossless (WAV) 16bit 48kHz. I believe at least most professional musicians and sound engineers would be able to identify the difference between all of these; while they might not always be "worse", their sonic character is certainly different.
I.e. I will definitely fail ABX test, but I still feel difference. IMHO, ABX tests are wrong tests for that problem.