I doubt any receiver made before around 2/1/07 has the fixed connector. Those made before may work fine, but are much more prone to breaking than they should be. From what we've gathered from polling people have have been using the HDMI connector on 211s and 622s, the chances of you using it without a problem for a couple of years is low. But you may get lucky.
If you take precautions with it, as in setting it up so that the cable runs up from the receiver, exerting a slight upward force on the connector, then the odds are better that you will not have a problem. No guarantees though. If you run it so that cable hangs down off of the back, and you either occasionally move the cable or the receiver, then the odds are very high that you will flex the connector so that the internal pins will break.
On my set the HDMI connection is noticably sharper than component. Although I had to readjust several of the settings to get my best HDMI picture. If you optimize all of your color, tint, brightness, picture settings for component and then switch over to HDMI to compare, it might look poor.