Yeah. After using an iPod Touch for a long time solely for a period of time (For around 8 months) to post to Twitter almost every day, I can't believe how thick an iPhone is. (And slowly realize that how iPod Touches are thin. And mine's just first gen.)
Kind of off topic, but I really agree. First few days with my iPhone was basically just me trying to get used to it's bulk. A week after I got it I picked up my old 2nd gen touch and felt like I was about to snap it - and I used to think that the iPod could've been thinner!