Washington (CNN) -- While Jeb Bush is still publicly noncommittal about a possible presidential bid, his family is far less circumspect. 

And if recent comments by George P. Bush are any indication, Jeb Bush's eldest son got the go-ahead from the family. The bigger question, of course, is whether Jeb Bush got the go-ahead -- from himself. 

While George P. told ABC that "I think it's more than likely that he's giving this a serious thought in moving forward," it's still unclear whether his father is actually willing to dive into a presidential bid. 

One source with knowledge of Jeb Bush's thinking tells CNN "wanting to do this and doing it are two different things." In fact this source adds, "He hasn't made a decision yet despite reports to the contrary. He is seriously considering and is going through a thoughtful process. He appreciates the warm wishes and support, but he is a methodical guy and won't change his timeline." 

That timeline anticipates Jeb Bush making a decision by the end of the year. While some donors may be waiting to see what Bush does before they commit to a candidate, the source says Bush himself has not asked for them to stay on the sidelines. "They are calling him, but all he is saying is he hasn't made a decision. There is no organized outreach sanctioned by him." 

Several donors told CNN that that in private sessions, Bush has not given any more indication than he has publicly about his intentions. One of the donors said "he is behaving as if he is looking at it seriously," but his reluctance to talk about it is "wearing thin." 
What is currently getting too thin?
 but his reluctance to talk about it is "wearing thin.