I don't think so, since in both 480i and 1080i, it's 60 fields/sec (technically 59.97 for NTSC), each field containing every other line of the image, or 30 full frames.
Well, I'm officially on the HD bandwagon, although the closest thing to an HD display I have is my computer monitor, so I figured I should post instead of just lurking this thread. We just got a Samsung SIR-T451 tuner, and are using the attic-mounted antenna we'd been using to watch analog TV (a UHF-only Zenith something or other, Yagi-style but with a loop for the driven element and curved piece of aluminum for a reflector, plus RCA preamp... not my choices, but they worked ok). With the antenna pointed torward north Bryan, all the analog channels came in well. 40 and 47 have a little static, but 3, 15, 23, and 28 are great.
As far as HD reception, KAMU and KYLE/KWKT come in great. KBTX (both CBS and UPN) will be great for a few seconds and then suddenly drop out. I think we may have to get a second antenna, since KBTX is the opposite direction from everything else.
Watching the signal strength meter, KAMU is a solid 10 bars (out of 10). KWKT hovers around 8, ranging from 6 to 9; I haven't noticed any dropouts. KBTX will have 5-6 bars when it's a steady picture, then drop to zero for a few seconds when the picture messes up.
In comparison, with rabbit ears in the bedroom, I can get KBTX and KAMU perfectly (10 bars), but no KWKT at all (blips of 2-3 bars, but nothing steady).
Something strange: I'm only getting program guide info on KAMU. KBTX and KWKT both just show "no data". Also, I see perfect closed captions on KBTX, intermittent dropouts on KWKT (picture is fine however), and none on KAMU. Anybody else having that issue?
Data point: According to antenna web, KYLE is at 271 degrees, 11.6 miles from me (I live in Forest Lakes, about 4 miles east of Harvey/Hwy6).
One more thing, perhaps FOX44CE can explain (or fix): I've noticed the picture on the SD FOX signal is darker than the other channels, like somebody turned the brightness down. Many shows are like this, but the myNetwork promos are particularly dark. This goes for both 28 analog and 28-1 DT. 28-2 is normal, and you can really see the difference flipping between 28-1 and 28-2.