There are still a good majority of believers who use the term tithe to reference the portion of income given to the God through the church. Is tithe an Old Testament term? Should churches use giving in place of tithe? Regardless of the term used, make sure the congregation understands the definition of the term.
I notice in traditional churches, the term tithe is most often used to define the portion of income given to God through the church. This term can have a negative effect on giving. Here is why, the term tithe indicates a minimum necessary in giving. Quite often, many individuals do not give more then the tithe (ten percent); they have given what is required. This is not the case overall—but it does happen.
Many non-traditional churches utilize giving to indicate the portion of income given to God through the church. Tithe is not often used but the principle of tithe is taught without focusing on the term. The term giving allows individuals to incorporate all they do for the church into one term. “I give to the church through helping in Sunday school.” The use of giving rather than tithe, can limit financial support; many individuals believe their giving includes service and not just a reference to finance.
My experience with either term is about the same. The terms used are not as important as the definition of the terms. Pastors and church leadership most clearly communicate the definition of terms. One caveat, avoid the use of stewardship when discussing monetary giving. The term is too broad and inappropriately used when discussing the topic of money.