No it's a Podfarm Guitar Patch as per my link that I made called Wah Chung and yes it's using an auto wah but I have the Powerpack add-on for my L6 GX so you may not have that affect but Reaper comes with loads of free VSTs and I think there' an Auto wah in there.It has heavy compression and also the Wah is panned off so when you play a chord it spreads the sound and sort of,"Ducks" it as well almost like a synth sound as you say.

BTW Reaper does support Mac OSX so you should download it as it's a fully working system and they use an,"Honour" system e,g if you like it after 30 days you pay for it.99.999% who use it end up buying it out of respect and decency and for what it costs it's power and ability is unbelieveable.The forum is probably the best and busiest one going and has a special section for most things including Macs.

http://forum.cockos.com/forumdisplay.php?f=34

I noticed an immediate increase in sound quality when I moved to Reaper.

Link has been updated with an extended version with more drum bass,guitar and a better organ sound

http://www.box.net/shared/cxmx6se9ro