hes actually talking about ramp up or tip in fuel. he is saying that before the down shift locks up that you should be in your PE which is done by the computer. you dont really have any control of that because we dont have access to the transient fueling tables. once again tuning off the narrowbands is a bad way of doing it. here is how i MAF tuned using PT without a wideband:

set my PE engagement up 15% above the normal (so my engagement is 30% TPS so i change that table to 45%, some say to shut PE off all together but incase i ****ed up i wanted some protection there.)
go for a long drive just driving normal staying out of PE
during the latter part of the drive i down shift to 2nd and make long pulls all the way to red line (still staying out of PE) if you can find some roads with hills so you can get higher load on the engine that will help push the MAF hz up higher in the table. watch the Hz while you are doing this and get as high in the table as you can. you should be able to make 8000HZ or so. if you get knock back off in a hurry.

then back to the house to analyze the data. Use the excel sheet to plot the data. your new curve will match the old curve in some spots but you will notice sections of it will either be higher or lower then the original curve. what i always did, and a lot of people will say its not right, is take the percent change you got for the last cell you hit (can find it on the calculations page) and multiply the remaining cells out to the end of the MAF table by that value. so the last cell you hit was 8000HZ and the percent change from the calculations page was .023456. i multiple every cell from 8125hz to 11500hz by 1.023456. it will bring the rest of the curve down or up to match a lot better. better yet is a 3rd order polynomial that will best fit your new data but i never had that. im sure its out there somewhere.

once i had my MAF dialed in usually after 4-5 interations of this process (reseting and learning trims in between logs) its on to the PE. for this i feel you need a wideband. even if you cant log the wideband you can just look at it while making the pulls. i always start on the rich side. so lets say you want to run 11.8 afr when its all said and done. i set the PE tables to like 11.2 so you have some cushion. you can make pulls and adjust this up or down depending on what your wideband is saying. if your MAF table is right your wideband will match the commanded PE from the table. if its not it wont bottom line.