This is a theory book!  It doesn't cover what is or isn't walk-in.

She's... maybe channeling Earth mana faster than when she started?  It's in fact hard to tell without any sort of measuring yardstick whether you're doing an unfamiliar task 5% faster.  She can maybe figure out some yardstick now, but if she didn't set one up in advance she won't be able to tell the difference by feel.

She can definitely do Earth spellforms that are supposed to take 10 thaums in less than one second, fast enough that it's hard to tell by feel how much less than one second.

This is a theory book!  It doesn't cover what is or isn't walk-in.

She's... maybe channeling Earth mana faster than when she started?  It's in fact hard to tell without any sort of measuring yardstick whether you're doing an unfamiliar task 5% faster.  She can maybe figure out some yardstick now, but if she didn't set one up in advance she won't be able to tell the difference by feel.

She can definitely do Earth spellforms that are supposed to take 10 thaums in less than one second, fast enough that it's hard to tell by feel how much less than one second.  She maybe couldn't have done that literally the very first time she succeeded in channeling Earth?

This is a theory book!  It doesn't cover what is or isn't walk-in.

She's... maybe channeling Earth mana faster than when she started?  It's in fact hard to tell without any sort of measuring yardstick whether you're doing an unfamiliar task 5% faster.  She can maybe figure out some yardstick now, but if she didn't set one up in advance she won't be able to tell the difference by feel.

She can definitely do Earth spellforms that are supposed to take 10 thaums in less than one second, fast enough that it's hard to tell by feel how much less than one second.