It's the easiest method of shuffle tracking and a great place to start. You would estimate the count of the low-card slug and add it to your initial running count. If the slug was small (just a few cards) then you can do your TC conversions and bet sizing normally. If the slug was a significant size then you just subtract it from your discard estimation. For example, if you cut a one-deck segment with 3 extra low cards to the back, start your running count at +3 instead of 0 and consider one deck to be in the discards (since you already counted it and it is out of play). You can use the same betting spread and indices that you normally would. All you are doing is playing against a smaller shoe with a positive running count off the top. It's every card counter's dream! :gaga:
The double downs are going to be the same during the "hot" section of the shoe either way. You are not changing the results of your big bets at all, and that is where all of your EV is. The only difference is that you are playing a few -EV hands off the top while waiting for the count to increase.
Also, think about the heat issues with this method. You are turning every shoe into a shoe that turns positive right away, then betting with the count. Imagine how easy it would be to pick off a card counter if every shoe was positive. When you cut those small cards to the back you are betting bigger off the top and maintaining a medium bet size instead of jumping from min to max as the count rises. Cutting the small clump to the back increases your EV and gives you some degree of cover.
Both methods will increase the frequency of high counts, decrease the frequency of low counts and improve your EV. Cutting them to the front is better for beginners who want to verify their results, but they should feel comfortable cutting them to the back soon enough.
-Sonny-