Is a pre-nup valid if signed 10 days before a marriage?

In the case of Gordon v. Gordon, 25 So.3d 615 (Fla. 4th DCA 2009) the parties entered into a prenuptial agreement ten days prior to their marriage. Neither party had legal counsel but had discussed the agreement for several months. The wife was "an individual with a high level of education and business acumen who, having twice married, understood the significance of the document she was about to sign and chose not to seek the advice of a lawyer." The agreement essentially provided that each party's property at the time of the marriage would remain his or her separate property.  In his financial disclosure, the husband listed various pension accounts but did not specify the pension he would receive from his employer. The court affirmed:

1. "We first address whether the agreement was reached under duress, coercion or overreaching. The record before us presents the former wife as an individual with a high level of education and business acumen who, having twice married, understood the significance of the document she was about to sign and chose not to seek the advice of a lawyer. And, while the parties disagreed over the amount of time the former wife had to contemplate the agreement, we hold that a trial court does not abuse its discretion by declaring that a period of ten days prior to the marriage is sufficient time for one to exercise the opportunity to review the agreement, and, if one so chooses, to seek the advice of legal counsel." 

2. "We next address whether the former husband's failure to specifically disclose his airline pension plan constitutes fraud, deceit, or misrepresentation. The agreement specifically provided that each party shall retain as separate property all retirement accounts and property listed on the attached schedules."

3. "Additionally, the agreement included a provision specifically addressing pension benefits under its own section heading. The former husband's schedule of property referenced "Retirement Plans (Keogh, 401(k), etc)" and specifically listed the former husband's 401(k) plan through his employer; however, no mention was made of the airline pension plan of which the former husband was a beneficiary."