What you said may be true... but are you sure you aren't justifying to yourself your early purchase by denying possible hardware revisions down the line and downplaying/counter arguing those who speak about the antenna issue?
Don't be so naive. And don't be so worried about your early purchase to the point of being defensive. IF they revise the hardware, you can always pull out your warranty card. Our whole family and a few of my best friends lined up for the 3GS on the day of release (for 5 hours). We all got 16gb (minus one person who got the 32). 8 of us had yellow screens while 1 had a "perceived as" nicer and whiter screen. I came to macrumors and the yellow screen issue blew up in the forums.
Guess what... all 9 of us (including the one with the "good screen") had to replace our phones for one reason or another within 6 months (battery, home button loose, popped out hold button etc). Not a single one of those warranty refurb phones had a yellow screen. Not ONE. The yellow screen may not have been an issue... but the internet made it so. And I'm pretty sure it was "stealth fixed" as the buzz disappeared over time. Alas, we all ended up with a perfect phone... albeit 6 months later.
Just be happy that Apple is so good about replacements within the warranty period. It may not always be like this in the future.
No need for me to justify i have always had good luck with iphones i have actually never had any reason to even meet with apple genius let alone get a refurb unit.
I just feel like people are crossing their fingers for a fix when they could have been enjoying the same phone from now until next year rather than waiting in hopes that there is a fix coming soon when there most likely isn't.