EDIT: I ended up writing several bugs with delegate coloring and tooltips here, let me know if this should be split in multiple issues.
Issue 1
In Options -> Fonts and Colors, I have "F# Functions/Methods" set to use Bold:

When declaring a delegate, part of the declaration seems to inherit that setting:

Here delegate of string is displayed in a bold font for no apparent reason. If I uncheck the bold option for F# Functions/Methods, it is displayed normally.
Issue 2
In addition, the type definition uses the color from "User Types - Classes" rather than "User Types - Delegates".
Issue 3
In addition, delegates have no coloring at the point of use:

They should use the color defined by "User Types - Delegates".
Issue 4
In addition, their tooltips are poor and not consistent with tooltips for most types:

EDIT: I ended up writing several bugs with delegate coloring and tooltips here, let me know if this should be split in multiple issues.
Issue 1

In Options -> Fonts and Colors, I have "F# Functions/Methods" set to use Bold:
When declaring a delegate, part of the declaration seems to inherit that setting:

Here
delegate of stringis displayed in a bold font for no apparent reason. If I uncheck the bold option for F# Functions/Methods, it is displayed normally.Issue 2
In addition, the type definition uses the color from "User Types - Classes" rather than "User Types - Delegates".
Issue 3

In addition, delegates have no coloring at the point of use:
They should use the color defined by "User Types - Delegates".
Issue 4

In addition, their tooltips are poor and not consistent with tooltips for most types: