In WaveLab 5 > Preferences > Display, there is a section called Waveform display containing two options: 1) Favour accuracy (peak detection) and 2) Favour speed. I believe the Favour speed feature was dropped with WaveLab 6 and has not returned since.
With reference to my attached screenshot example, option (1) renders the «WaveLab 6-style» waveform while option (2) results in the «WaveLab 5-style» waveform. Both waveforms display the exact same source.
Please revive the option to choose between Favour accuracy (peak detection) and Favour speed.
Favour speed is very helpful for editing and general navigation when working with compressed/loud audio.