I think Robb knew he would be the one to go before his final TC so he really had nothing to gain by telling the others how he felt - admittedly he had nothing to lose either.
I don't see him as the type of person who talks about his feelings readily though.
Jiff seemed pretty disgusted when they voted him out which I found highly amusing.
Jiff's been a bit of a snot with them this season which makes me laugh.
I wonder why he didn't get all uppity when come people voted for Ken as NYC, yet he got all annoyed with Clay when he voted for Ghandia as Denver Diva.