In this reddit thread it's said TF made all time high bets on JD, is that true?
Yes, it's true. There was talk at the time of his 561 BTC bet being a new "biggest ever BTC bet".
On 29th June, BTC was trading on Mt.Gox between $93 and $98.
Three of his bets are still listed on https://just-dice.com/biggest.txt :
Quote
biggest bets in last 52 weeks
+-----------+---------------+----------------+---------+--------+---------------------+
| betid | bet | profit | chance | uid | date |
+-----------+---------------+----------------+---------+--------+---------------------+
| 7093577 | 561.29526541 | 5.72750179 | 98 | 35 | 2013-06-29 04:59:20 |
| 7079332 | 497.14723423 | 32.07401559 | 93 | 35 | 2013-06-29 04:21:59 |
| 6966857 | 497.14723423 | 32.07401559 | 93 | 35 | 2013-06-29 01:01:37 |
+-----------+---------------+----------------+---------+--------+---------------------+
+-----------+---------------+----------------+---------+--------+---------------------+
| betid | bet | profit | chance | uid | date |
+-----------+---------------+----------------+---------+--------+---------------------+
| 7093577 | 561.29526541 | 5.72750179 | 98 | 35 | 2013-06-29 04:59:20 |
| 7079332 | 497.14723423 | 32.07401559 | 93 | 35 | 2013-06-29 04:21:59 |
| 6966857 | 497.14723423 | 32.07401559 | 93 | 35 | 2013-06-29 01:01:37 |
+-----------+---------------+----------------+---------+--------+---------------------+
Edit: From the Just-Dice chat logs:
Quote
(35) dooglus: am I still the biggest bet or do I need to bet more again 
(1) you're still the biggest
(1) (and you need to bet again
)
(1) you're still the biggest
(1) (and you need to bet again
)