Are you sure about that? According to this CNN report:
Democrats have blocked 10 of Bush's 52 appeals court nominations through filibuster threats, while allowing the confirmation of 34 others.
If this story is accurate, one third of the president's appellate court nominations have been defeated, a majority of those by filibuster.
By the way, this use of the filibuster to indefinitely prevent a vote on a judicial nominee is unprecedented. Yes, Abe Fortas' nomination to become Chief Justice was delayed for four days, but at that time senators were still saying they were undecided. I doubt that after months and years of delay, the senators are still deliberating on how they will vote on President Bush's nominees.
(Besides the ethical problems that led to Fortas' eventual resignation, some senators questioned whether President Johnson could nominate someone for Chief Justice when that position was already occupied).