Agreed. I think the mistake people make is assuming that target normal cost and funding target have anything to do with reality. Bad consulting will produce bad results and there is a lot of bad consulting out there, especially with the TPAs that use a "signature for hire" actuary.
Assuming interest crediting rates are less than funding rates, the funding target is generally lower than the hypothetical cash balance. This produces a Minimum Required Contribution that is typically less than the amount necessary to keep the plan 100% funded based on actual account balances. Also, as the plan matures, the maximum deductible will generally be significantly more than the amount necessary to keep the plan 100% funded.
We typically talk to our clients about "recommended" contributions that will keep the plan 100% funded. Getting that recommended number to fit within the minimum and maximum usually isn't a problem, but it certainly could be if rates move dramatically.