Not sure about Teletext (I don't have access to it) but I suspect it is more up-to-date than the internet prices. The prices shown on Sky Racing are ALWAYS more up-to-date than the internet prices. For example TABCORP releases new estimates at 1:45 before scheduled jump, 0:15 before jump and then every minute (if race jumps late). So if race is supposed to start at 2:30 there will be an update at 2:28:15, 2:29:45 then 2:30:45, 2:31:45 etc if it is late. These updates generally appear within a few seconds on the SKY Racing coverage but are usually appear about 10-15 seconds later on the internet. For Unitab and NSW the updates are more frequent (every 20-30 seconds close to race jump) and also seem to make it to their internet sites quicker (often only a few seconds behind the SKY updates).