This is true. Plus, HDMI is a cranky, unstable standard. We were using component whenever we could to prevent trouble calls. Far too many trouble calls because the customer's picture would just black out, and wouldn't come back on with certain TVs. This of course had to do with the tiniest glitch with the so-called "HDCP" bullsh*t. One hiccup, and the HDMI link would stop functioning.
I use HDMI on 2 different TVs, with 2 sat boxes, 2 cable boxes, PS3, and 2 DVD recorder-players. The only device I have ever had a problem with was one of the cable boxes on one of the TVs. It would cut out, but that was because the cable box was sending the TV the signal at too high of bitrate. Once the TV and cable box were plugged in in the correct order I have had no problems. Frustrating, yes, but only temporarily on one cable box and one TV. The other devices have all been trouble free using HDMI.
For the record, with my TVs, HDMI looks better on all devices than component cables. I have tried both. Some people find component looks better on their TVs with Dish and Sat but that is not the case for everybody.