No, still around 30 seconds from power button to login screen (including 3 second Clover menu delay) on HDD. I'm running the system this way for already two days and haven't encountered any problems so far. It seems the Clover's kernel cache injection works fine. My presumption is that it works pretty much like the on-the-fly kext patch function. The catch is only kexts that don't exist in /S/L/E as kext names and/or identifiers can be injected this way.