Tanlic is getting a it of stick here, and I think he's spot on with regards Dysart Dynamo being the most deliberate and least fluent of the big four in the Supreme market.
I've watched all their races back several times now and Sir Gerhard and Jonbon are much quicker over their hurdles than Dysart Dynamo is, who at times is a bit ponderous and less fluent, generally spending more time in the air. Something Willie can work on for sure, but given Sir Gerhard has the prime spot with his entry at the DRF, if he wins well enough, there's no way he gets shifted out of the Supreme I don't think.
If that happens then it becomes a case of whether Willie want to go with two guns or whether he splits them. The Ballymore looks the easier race to win, so given previous MO you'd think he will want one of them running in it. Therefore it's worth looking at the profile of Willie's Supreme winners to see which is more likely to stay there. He's a creature of habit and for the Supreme all of his winners have either started out in points or out of France. His few candidates that started out in bumpers have all been unplaced and have a 0% win and place record. In other words Dysart Dynamo doesn't fit his usual MO. Experience also seems to have become increasingly important for the race. DD will lack it with a couple of relatively easy bumpers and hurdles as his only career experience. So you have to surmise his overall profile looks more suited to a Mullins Ballymore type.
Ultimately though, even with this kind of analysis none of us know what goes where, and Willie definitely won't have made a decision yet because he doesn't need to. And as we've seen to our cost sometimes, that's right up to the last minute (Vautour anyone?!). So we can only have opinion rather than be certain, but it's definitely worth looking at the reasons that decisions might be made.
I've heard people say the market is suggesting a decision has been made, but that's rubbish. The run on prices for DD Supreme and Sir G Ballymore is because people will have had big antepost positions on both Dysart Dynamo for the Ballymore and Sir Gerhard for the Supreme, so the bookies will have seen a ton of money the other way round in a very short space of time. so they will just cut because they can knowing punting behaviour. Given they have a stack of money the other way round they move to a win/win position and it's in their interests to cut DD for the Supreme and Sir Gerhard for the Ballymore, and run of money forces them to do it anyway. Ne money for Dysart Dynamo for the Supreme will have come as well because he just won a recognised Supreme trial, so he was sure to be very heavily cut. None of which means he goes to the race though.
FWIW I see the case both ways, but when considering all these factors, if Sir Gerhard puts a performance in at the DRF then I'd still see it as Sir Gerhard Supreme and Dysart Dynamo Ballymore. I'd also add that Sir Gerhard is the only one that's been in a decent race so far, and he'll get another one in a couple of weeks. If he does that well I think his current Supreme price will look ridiculous.