I'm just confirming that the tests are very flawed since tablets on both sides can spoof the UA string anyway.
IMO, the tablet market isn't more than 90% iPad anymore. We have to take account competitors like the Galaxy Tab and Transformer which are selling very well, TouchPad gaining a boost due to the fire sale, etc. So I'd figure about 70-80% iPad domination right now. Still pretty damn big though. Maybe once Tegra 3 and ICS as well as Windows 8 slates start rolling out, that will decrease to 60-50% by the next 2 years. Just a really rough guesstimate, mind you.