Here ye go for comparison
$ pwd
/media/LivePCLinuxOS/changes/var/log
$ grep -R error *
dmesg:end_request: I/O error, dev sr0, sector 0
dmesg:end_request: I/O error, dev sr0, sector 0
dmesg:EXT2-fs (sr0): error: unable to read superblock
dmesg:end_request: I/O error, dev sr0, sector 0
dmesg:EXT2-fs (sda2): error: unable to read superblock
dmesg:EXT2-fs (sda6): error: couldn't mount because of unsupported optional features (240)
dmesg:EXT2-fs (sda7): error: couldn't mount because of unsupported optional features (240)
dmesg:EXT2-fs (sdb3): error: unable to read superblock
gdm/:0.log: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
gdm/:0.log.1: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
gdm/:0.log.1:error setting MTRR (base = 0xc0000000, size = 0x0ff00000, type = 1) Invalid argument (22)
Xorg.0.log: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
Xorg.0.log.old: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
I think that the delay is after the logs have been written.
I would have thought of blaming the writing of the persistence data as the culprit, but the delay is exactly the same even before persistence is used.
Sorry, no ideas ......
regards.