I migrated from Arch to Debian(wheezy) recently.Since Debian was still using sysVinit, I migrated to systemd, but following this.The system booted after a long init, using fallback LSB scripts for some services.I initially started analyzing boot using systemd-analyze blame | plot.It seems that after console-setup unit start, there was a pause for about 1 minute.I setup bootchart2 which indicated a rather long running udevd process which which finally leads to sysinit.target at which point remaining units to fireup unto graphical.target.I also have migrated manually some LSB scripts to systemd units, currently have just a bare minimum only in /etc/rcS.d for bootup.Still there has been no change in the boot characteristics.I don't know what else to look into further.Except I noticed this in dmesg, which seems like a huge gap, seeming to suggest that keyboard init is delaying the udev job, or am I just being optimistic.[   15.423975] cfg80211:     (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm)[   97.812894] input: ACPI Virtual Keyboard Device as /devices/virtual/input/input6In any case I am not able to debug any further.Please help in suggesting how to resolve the slow boot up with systemd.NOTE: with initialy complete sysv type boot, I got the graphical(gdm3) prompt in about 30s, which is consistent with what I used top get in Arch. 
debian wheezy extreme boot delay
debian;systemd;udev