Just wanted to clarify a few things...
1) I am using a Time Capsule as my wifi. It's set to default settings, broadcasting on different frequencies (have an older printer).
1.5) My new iPad always had good Wifi radio signal strength.
2) My new iPad was showing 9mbps download, 4mbps upload.
3) My first gen iPad was showing 18mbps download, 4 Mbps upload.
4) Resetting the device did nothing.
5) Resetting General:Reset:Reset Network Settings brought the speed to about 13 Mbps download.
6) Turning Wifi:Ask to Join networks:Off brought the speed to 18mbps, same as original iPad
7) Changed back to Wifi:Ask to Join Networks:On brought the speed back to 13 Mbps
Conclusion:
In my case, wifi radio signal at iPad was strong at all times.
But, changing those settings fixed my problem.
Perhaps the new iPad was defaulting to a lower freq. radio signal which could explain the delta seen when resetting wifi?
But, still do not understand why Ask to Join Networks would have such an impact on my speeds, or why the new iPad would default to a lower freq wifi (if that was, indeed the case?)