Obviously increasing the engine speed with the clutch in will have no effect on the transmission speed, to get the speeds to match you have to double declutch, by connecting the engine and the transmission you can change the speed of the input shaft to match that of the other half of the transmission and then clutch again to stick it into gear (or if you're competent you never need touch the clutch).
Thats what I said and you'd have known that if you read my reply.
Anyhow, I found what I was thinking of.
".. but the single clutch works if you blip higher than you would if you engage the clutch in neutral. Blipping higher spins the input shaft the same amount, even without the direct connection between engine and input shaft that engaging the clutch in neutral provides."
- Carl Lopez, Going Faster
You must have some nice factory warrantees on new cars. I expect my car to last longer than 43,000 miles, even if it is a Ford. Judging by my old vehicle, with no oil changes for it's last 90,000 miles. I got rid of it running in fantastic condition at 190,000 miles, well above the 50,000 mile warrantee on that one.