So I flip the switch on the side - when I got a call it didn't vibrate, did I not set something correctly? I did turn on the LED indicator, that did flash and very brightly too -made everyone at my meeting look at me and give me a WTF look 

Check settings-sounds and make sure vibrate on ring and vibrate on silent are both on.
No one else with this problem?
Thanks
I have the "vibrate on silent" toggle on "ON" while in silent mode, but the vibrate is like a series of very short pulses. I'm running iOS 6 on a Verizon iPhone 4.
Sometimes I can't feel it pulsing, so I miss a call.
Anyone know if the series of short vibrating pulses when the phone is on silent mode with "vibrate on silent" toggle turned "ON" a new feature?
Sorry for the confusing post.
You might have changed the vibrate style to "heartbeat". Go to Sounds and double-check.
Go to Settings=>Sounds=>Ringtone=>Vibration. Mine was set to "none". I changed it to one of the vibration options and now it works.