Vagrant up is very very slow

[spuder]

Running vagrant up with the Vagrant file provided, takes over 10 minutes to start (not including the time it takes to download the box).

Here is the Vagrant file that I always use with my puppet manifests for reference. The box spins up within 60 seconds.

https://gist.github.com/spuder/9508ca074c3ce940be04
Here is anther example
https://github.com/spuder/puppet-gitlab/blob/master/Vagrantfile

sowen@spencers-mbp:/tmp/puppet-influxdb$ vagrant up
Bringing machine 'centos' up with 'virtualbox' provider...
Bringing machine 'ubuntu' up with 'virtualbox' provider...
==> centos: Importing base box 'centos64'...
==> centos: Matching MAC address for NAT networking...
==> centos: Setting the name of the VM: puppet-influxdb_centos_1412793678850_50361
==> centos: Clearing any previously set forwarded ports...
==> centos: Clearing any previously set network interfaces...
==> centos: Preparing network interfaces based on configuration...
    centos: Adapter 1: nat
==> centos: Forwarding ports...
    centos: 22 => 2222 (adapter 1)
==> centos: Booting VM...
==> centos: Waiting for machine to boot. This may take a few minutes...
    centos: SSH address: 127.0.0.1:2222
    centos: SSH username: vagrant
    centos: SSH auth method: private key
    centos: Warning: Connection timeout. Retrying...    # Vagrant pauses for a long time here
    centos: Warning: Connection timeout. Retrying...
    centos: Warning: Connection timeout. Retrying...
==> centos: Machine booted and ready!
==> centos: Checking for guest additions in VM...
    centos: The guest additions on this VM do not match the installed version of
    centos: VirtualBox! In most cases this is fine, but in rare cases it can
    centos: prevent things such as shared folders from working properly. If you see
    centos: shared folder errors, please make sure the guest additions within the
    centos: virtual machine match the version of VirtualBox you have installed on
    centos: your host and reload your VM.
    centos: 
    centos: Guest Additions Version: 4.2.10
    centos: VirtualBox Version: 4.3
==> centos: Setting hostname...                # Vagrant also pauses for several minutes here

Is there a reason for using the rsync to sync directories instead of using the traditional vagranty way of syning dirs ? I suspect that may be contributing to why it is so slow.